diff --git a/public_api_utils/domotz_inventory_overviewer/.gitignore b/public_api_utils/domotz_inventory_overviewer/.gitignore
new file mode 100755
index 0000000..f5794af
--- /dev/null
+++ b/public_api_utils/domotz_inventory_overviewer/.gitignore
@@ -0,0 +1,24 @@
+# Sensitive files - DO NOT COMMIT
+.env
+
+# Log files
+*.log
+bulk_script_apply_Log.txt
+
+# Excel/CSV data files (may contain sensitive information)
+*.xlsx
+*.csv
+!domotz_automation_scripts_mass_apply_TEMPLATE.csv
+
+# PowerShell temporary files
+*.ps1~
+
+# Windows thumbnail cache
+Thumbs.db
+
+# macOS
+.DS_Store
+
+# Old
+Old/
+
diff --git a/public_api_utils/domotz_inventory_overviewer/README.md b/public_api_utils/domotz_inventory_overviewer/README.md
new file mode 100755
index 0000000..4a410b5
--- /dev/null
+++ b/public_api_utils/domotz_inventory_overviewer/README.md
@@ -0,0 +1,322 @@
+# Domotz Inventory Overviewer - Export to Excel Tool
+
+A PowerShell tool designed to extract data from Domotz (Organizations, Collectors, Devices) and export to a formatted Excel file.
+
+The script retrieves information from your Domotz account via the API and creates an Excel workbook with separate worksheets for Organizations, Collectors, and Devices.
+
+---
+
+## System Requirements - Mandatory Requirements
+
+- **Windows PC** - This script only runs on Windows
+- **PowerShell** - Pre-installed on Windows
+- **Microsoft Excel** - Must be installed on the PC
+- **ImportExcel Module** - PowerShell module (installation instructions below)
+
+## First-Time Setup
+
+### Step 1: Execution Policy
+
+Before running any PowerShell script, you need to allow script execution:
+
+```powershell
+Set-ExecutionPolicy -Scope Process -ExecutionPolicy Bypass
+```
+
+When prompted, respond with:
+
+- `Y` (for Yes) - Allow for this session only
+- `A` (for All) - Allow for all scripts in this session
+
+> **Note:** This only affects the current PowerShell session and doesn't change your system-wide settings.
+
+### Step 2: Install ImportExcel Module
+
+**Check if already installed:**
+
+```powershell
+Get-Module -ListAvailable -Name ImportExcel
+```
+
+**If not installed:**
+
+```powershell
+Install-Module -Name ImportExcel -Scope CurrentUser -Force
+```
+
+### Step 3: Configure API Access
+
+Create a file named `.env` in the same folder as the script:
+
+```env
+API_KEY='your_actual_api_key'
+BASE_URL='https://api-us-east-1-cell-1.domotz.com/public-api/v1'
+```
+
+**BASE_URL by Region:**
+
+- **US Region:** `https://api-us-east-1-cell-1.domotz.com/public-api/v1`
+- **EU Region:** `https://api-eu-west-1-cell-1.domotz.com/public-api/v1`
+
+> **Tip:** Get your API key from Domotz account settings. See [Domotz API Documentation](https://help.domotz.com/admin-global-features/domotz-api/) for details.
+
+## Getting Help
+
+### View Usage Information
+
+To see complete usage instructions and available operations:
+
+```powershell
+.\inventory_overviewer.ps1 -help
+# or
+.\inventory_overviewer.ps1 -?
+```
+
+---
+
+## Quick Start
+
+### Extract All Data (Default)
+
+Run the script without parameters to extract all data (Organizations, Collectors, Devices):
+
+```powershell
+.\inventory_overviewer.ps1
+```
+
+This will:
+
+- Retrieve all collectors from your account
+- Count managed devices per collector
+- Extract Organizations, Collectors, and Devices data
+- Create a formatted Excel file with three worksheets
+- Auto-open the file for review
+
+---
+
+## Available Operations
+
+| Operation           | Description                   | Required Parameters | Optional Parameters                               |
+| ------------------- | ----------------------------- | ------------------- | ------------------------------------------------- |
+| `extract` (default) | Extract data and create Excel | None                | `-collector_ids`<br>`-device-type`<br>`-filename` |
+| `list_collectors`   | List all collectors/agents    | None                | None                                              |
+
+---
+
+## Usage Examples
+
+### List All Collectors
+
+```powershell
+.\inventory_overviewer.ps1 -operation list_collectors
+```
+
+Shows all collectors/agents in your Domotz account with their IDs.
+
+### Extract All Data
+
+```powershell
+.\inventory_overviewer.ps1
+```
+
+Extracts Organizations, Collectors, and Devices to Excel.
+
+### Extract from Specific Collectors
+
+```powershell
+.\inventory_overviewer.ps1 -collector_ids "312189,313759"
+```
+
+> **Note:** When using `-collector_ids`, the Organizations worksheet is not created (since you're filtering to specific collectors).
+
+### Extract Only Managed Devices
+
+```powershell
+.\inventory_overviewer.ps1 -device-type managed
+```
+
+### Extract Only Unmanaged Devices
+
+```powershell
+.\inventory_overviewer.ps1 -device-type unmanaged
+```
+
+### Custom Output Filename
+
+```powershell
+.\inventory_overviewer.ps1 -filename "domotz_export_2025"
+```
+
+### Combine Options
+
+```powershell
+.\inventory_overviewer.ps1 -collector_ids "312189" -device-type managed -filename "site_a_devices"
+```
+
+---
+
+## Parameters
+
+| Parameter        | Description                               | Values                                      | Default                |
+| ---------------- | ----------------------------------------- | ------------------------------------------- | ---------------------- |
+| `-operation`     | Operation to perform                      | `extract`, `list_collectors`                | `extract`              |
+| `-collector_ids` | Filter by collector IDs (comma-separated) | Any valid collector IDs                     | All collectors         |
+| `-device-type`   | Filter device types                       | `managed`, `unmanaged`, `managed,unmanaged` | `managed,unmanaged`    |
+| `-filename`      | Custom output Excel filename              | Any string                                  | `inventory_overviewer` |
+| `-debug`         | Enable detailed logging                   | Switch                                      | Off                    |
+| `-help`          | Show help                                 | Switch                                      | -                      |
+
+---
+
+## Understanding the Excel Output
+
+### Worksheets Created
+
+| Worksheet         | Description                                                   | Created When               |
+| ----------------- | ------------------------------------------------------------- | -------------------------- |
+| **Organizations** | List of organizations with collector counts and device totals | No `-collector_ids` filter |
+| **Collectors**    | Detailed collector information                                | Always                     |
+| **Devices**       | All devices (managed and/or unmanaged)                        | Always                     |
+
+### Organizations Worksheet Columns
+
+- `organization_id` - Organization ID
+- `organization_name` - Organization name
+- `collector_count` - Number of collectors in this organization
+- `number_of_managed_devices` - Total managed devices across all collectors
+- `collector_ids` - List of collector IDs (one per line)
+- `collector_names` - List of collector names (one per line)
+
+### Collectors Worksheet Columns
+
+- `collector_id` - Collector/agent ID (hyperlinked to Domotz portal)
+- `display_name` - Collector name
+- `number_of_managed_devices` - Count of managed devices
+- `status` - Online/Offline status
+- `organization_id`, `organization_name` - Organization info
+- `agent_version`, `package_version` - Software versions
+- `licence_code`, `licence_type` - License information
+- `bound_mac_address` - MAC address of the collector
+- `wan_ip`, `wan_hostname` - WAN connection info
+- `latitude`, `longitude` - Location coordinates
+- And more...
+
+### Devices Worksheet Columns
+
+- `collector_id`, `collector_name` - Parent collector info
+- `device_id` - Device ID
+- `display_name` - Device name (hyperlinked to Domotz portal)
+- `device_type` - `managed` or `unmanaged`
+- `status` - Device status (managed devices only)
+- `ip_addresses` - IP address(es)
+- `hw_address` - MAC address
+- `vendor`, `model` - Device manufacturer info
+- `type_label` - Device type (e.g., "Network Equipment", "Audio & Video")
+- And more...
+
+### Visual Formatting
+
+The Excel file includes professional formatting:
+
+- **Yellow header row** with bold text
+- **AutoFilter** enabled on all columns
+- **Borders** on all cells
+- **Hyperlinks** on device and collector names (blue, underlined)
+- **Unmanaged devices** styled with dark grey text
+- **Empty cells** in unmanaged rows have light grey fill
+- **Devices worksheet** is the active tab when opened
+
+---
+
+## Troubleshooting
+
+### Script Won't Run - Execution Policy Error
+
+**Error:** `...cannot be loaded because running scripts is disabled...`
+
+**Solution:**
+
+```powershell
+Set-ExecutionPolicy -Scope Process -ExecutionPolicy Bypass
+```
+
+Respond `Y` or `A` when prompted, then run the script again.
+
+### ImportExcel Module Not Found
+
+**Error:** `The term 'Import-Excel' is not recognized...`
+
+**Solution:**
+
+```powershell
+Install-Module -Name ImportExcel -Scope CurrentUser -Force
+```
+
+### Invalid Parameter Error
+
+**Error:** `Unknown parameter(s) detected...`
+
+**Solution:**
+
+- Check parameter names for typos
+- Use `-help` to see valid parameters
+- Valid parameters: `-operation`, `-collector_ids`, `-device-type`, `-filename`, `-debug`, `-help`
+
+### Invalid Collector IDs
+
+**Error:** `None of the specified collector IDs were found...`
+
+**Solution:**
+
+- Run `-operation list_collectors` to see valid IDs
+- Verify the collector IDs in your command
+
+### API Key Issues
+
+**Error:** `401: Unauthorized`
+
+**Solution:**
+
+- Verify `.env` file is in the same folder as the script
+- Check `API_KEY` is correct (no extra quotes/spaces)
+- Ensure `BASE_URL` matches your region
+- Verify API key is active in Domotz
+
+---
+
+## Files Generated
+
+- **Excel File:** `inventory_overviewer.xlsx` (or custom name)
+- **Log File:** `inventory_overviewer_Log.txt`
+
+> **Note:** If a file already exists, a timestamp is automatically appended to avoid overwriting.
+
+The log file contains complete execution history, API calls, and processing details for troubleshooting.
+
+---
+
+## FAQ
+
+**Q: Can I filter to specific collectors?**  
+A: Yes, use `-collector_ids "id1,id2,id3"` to extract data only from those collectors.
+
+**Q: Why is the Organizations worksheet missing?**  
+A: When you use `-collector_ids` filter, the Organizations worksheet is skipped since you're filtering to specific collectors.
+
+**Q: What's the difference between managed and unmanaged devices?**  
+A: Managed devices are actively monitored by Domotz with full details. Unmanaged devices are detected but not actively monitored, so they have fewer data fields.
+
+**Q: How can I tell managed from unmanaged devices in the Excel?**  
+A: The `device_type` column shows "managed" or "unmanaged". Additionally, unmanaged devices are styled with dark grey text and grey fill on empty cells.
+
+**Q: Can I export to CSV instead of Excel?**  
+A: The script creates Excel files (.xlsx). You can open the file and save as CSV from Excel if needed.
+
+**Q: How often should I run the extraction?**  
+A: As needed. Each run creates a snapshot of your current Domotz data.
+
+---
+
+## License
+
+This script is provided "AS IS" for illustrative/educational purposes. See script header for full disclaimer.
diff --git a/public_api_utils/domotz_inventory_overviewer/domotz_inventory_overviewer.zip b/public_api_utils/domotz_inventory_overviewer/domotz_inventory_overviewer.zip
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Binary files /dev/null and b/public_api_utils/domotz_inventory_overviewer/domotz_inventory_overviewer.zip differ
diff --git a/public_api_utils/domotz_inventory_overviewer/env_template.txt b/public_api_utils/domotz_inventory_overviewer/env_template.txt
new file mode 100755
index 0000000..d10927b
--- /dev/null
+++ b/public_api_utils/domotz_inventory_overviewer/env_template.txt
@@ -0,0 +1,13 @@
+# Domotz API Configuration
+# Copy this file to .env and fill in your actual values
+
+# Your Domotz API Key
+# e.g.
+API_KEY='your_api_key_here'
+
+# Domotz API Base URL (adjust based on your region)
+# US East: BASE_URL='https://api-us-east-1-cell-1.domotz.com/public-api/v1'
+# EU: BASE_URL='https://api-eu-west-1-cell-1.domotz.com/public-api/v1'
+# e.g.
+BASE_URL='https://api-us-east-1-cell-1.domotz.com/public-api/v1'
+
diff --git a/public_api_utils/domotz_inventory_overviewer/inventory_overviewer.ps1 b/public_api_utils/domotz_inventory_overviewer/inventory_overviewer.ps1
new file mode 100755
index 0000000..71106f9
--- /dev/null
+++ b/public_api_utils/domotz_inventory_overviewer/inventory_overviewer.ps1
@@ -0,0 +1,1444 @@
+# DISCLAIMER:
+# This script is provided "AS IS" and is intended solely for illustrative or educational purposes.
+# Domotz makes no warranties, express or implied, including but not limited to warranties of merchantability, fitness for a particular purpose, or non-infringement. Use of this script is at your own risk.
+# By using this script, you acknowledge and agree that Domotz shall not be liable for any direct, indirect, incidental, or consequential damages or losses arising from its use.
+# You further agree to indemnify, defend, and hold harmless Domotz and its affiliates from and against any claims, liabilities, damages, or expenses resulting from your use or misuse of this script.
+#
+# In the event of any conflict between this disclaimer and any other agreement between you and Domotz, this disclaimer shall prevail with respect to the use of this script.
+
+# ---------------------------------------------------------------------------------------------------------------------------
+#
+# SCRIPT PURPOSE:
+# This script extracts data from Domotz (Organizations, Collectors, Devices) and exports to Excel.
+#
+# PARAMETERS:
+#   -object-type   : What to extract: "all", "organizations", "collectors", "devices" (comma-separated)
+#   -collector_ids : Comma-separated list of collector IDs to filter (optional, default: all)
+#   -operation     : "extract" or "list_collectors" (default: extract)
+#   -device-type   : "managed", "unmanaged", or "managed,unmanaged" (default: managed,unmanaged)
+#
+# ---------------------------------------------------------------------------------------------------------------------------
+
+# ================================================================================
+# # SETUP INSTRUCTIONS (First Time)
+# ================================================================================
+
+# 1. CONFIGURE .ENV FILE:
+# Create a file named '.env' in the same folder as this script with:
+
+# API_KEY='<your API Key here>'
+# BASE_URL='<API endpoint for your region>'
+
+# BASE_URL Options:
+# - US Region: https://api-us-east-1-cell-1.domotz.com/public-api/v1
+# - EU Region: https://api-eu-west-1-cell-1.domotz.com/public-api/v1
+
+# 2. CHECK IMPORTEXCEL MODULE:
+# Run: Get-Module -ListAvailable -Name ImportExcel
+
+# If the command returns nothing, the module is NOT installed.
+# Install it with: Install-Module -Name ImportExcel -Scope CurrentUser -Force
+
+
+# Check if operation parameter is provided
+param(
+    [string]$collector_ids,
+    [string]$operation,
+    [Alias("device-type")]
+    [string]$device_type,
+    [string]$filename,
+    [switch]$debug,
+    [Alias("h", "?")]
+    [switch]$help
+)
+
+# Check for help arguments (support both / and - prefixes)
+if ($args -contains "/help" -or $args -contains "/?" -or $args -contains "/h") {
+    # Set a flag to show help after functions are defined
+    $script:showHelpOnly = $true
+}
+
+# Check for unknown/invalid parameters passed via $args
+if ($args.Count -gt 0 -and -not $script:showHelpOnly) {
+    # Filter out help flags that we already handled
+    $unknownArgs = $args | Where-Object { $_ -notin @("/help", "/?", "/h") }
+    if ($unknownArgs.Count -gt 0) {
+        $script:hasInvalidParams = $true
+        $script:invalidParamsList = $unknownArgs
+    }
+}
+
+# Function to load environment variables from .env file
+function Load-EnvFile {
+    $envPath = Join-Path $PSScriptRoot ".env"
+    if (Test-Path $envPath) {
+        Get-Content $envPath | ForEach-Object {
+            if ($_ -match '^\s*([^#][^=]+)=(.*)$') {
+                $key = $matches[1].Trim()
+                # Remove any quotes from the value and trim whitespace
+                $value = $matches[2].Trim().Trim('"', "'")
+                Set-Item "env:$key" $value
+            }
+        }
+        Write-Host "Environment variables loaded successfully from .env file"
+    }
+    else {
+        Write-Host "WARNING: .env file not found at $envPath" -ForegroundColor Yellow
+        Write-Host "Please create a .env file with the following content:"
+        Write-Host "API_KEY=your_api_key_here"
+        Write-Host "BASE_URL=your_base_url_here"
+        exit
+    }
+}
+
+# Load environment variables
+Load-EnvFile
+
+# Check if required environment variables are set
+if (-not $env:API_KEY -or -not $env:BASE_URL) {
+    Write-Host "ERROR: Required environment variables API_KEY and/or BASE_URL are not set in .env file" -ForegroundColor Red
+    exit
+}
+
+# Define API Key and Base URL from environment variables and ensure proper formatting
+$apiKey = $env:API_KEY
+$baseURL = $env:BASE_URL.TrimEnd('/')  # Remove trailing slash if present
+
+# Validate base URL format
+try {
+    $uri = [System.Uri]::new($baseURL)
+    if (-not ($uri.Scheme -eq "http" -or $uri.Scheme -eq "https")) {
+        throw "Invalid URL scheme. Must be http or https."
+    }
+}
+catch {
+    Write-Host "ERROR: Invalid BASE_URL format in .env file. Must be a valid HTTP/HTTPS URL." -ForegroundColor Red
+    Write-Host "Current value: $baseURL"
+    exit
+}
+
+# Check if ImportExcel module is available
+if (-not (Get-Module -ListAvailable -Name ImportExcel)) {
+    $errorMsg = @"
+
+================================================================================
+                                    ERROR                                       
+================================================================================
+
+The ImportExcel PowerShell module is required for this script!
+
+SOLUTION: Install the module by running the following command:
+
+Install-Module -Name ImportExcel -Scope CurrentUser
+
+Script execution stopped.
+================================================================================
+"@
+    Write-Host $errorMsg -ForegroundColor Red
+    exit
+}
+
+# Get the PowerShell script name dynamically (without .ps1 extension)
+$PS_SCRIPT_NAME = [System.IO.Path]::GetFileNameWithoutExtension($PSCommandPath)
+
+# Define constants
+$DEFAULT_EXCEL_BASENAME = $PS_SCRIPT_NAME
+$DEFAULT_EXCEL_FILENAME = "$DEFAULT_EXCEL_BASENAME.xlsx"
+
+# Define log file (dynamic based on script name)
+$logFile = ".\$($PS_SCRIPT_NAME)_Log.txt"
+
+# Function to list collectors/agents
+function List-Collectors {
+    param (
+        [bool]$numbered = $false,
+        [bool]$silent = $false
+    )
+    
+    try {
+        $agentEndpoint = "$baseURL/agent"
+        $agentHeaders = @{
+            "X-Api-Key"    = $apiKey
+            "Accept"       = "application/json"
+            "Content-Type" = "application/json"
+        }
+        
+        $agents = Invoke-RestMethod -Uri $agentEndpoint -Method Get -Headers $agentHeaders
+        
+        if ($agents.Count -eq 0) {
+            if (-not $silent) {
+                $noAgentsMsg = "`nNo collectors/agents found in your Domotz account."
+                Write-Host $noAgentsMsg -ForegroundColor Yellow
+                $noAgentsMsg | Out-File -FilePath $logFile -Append
+            }
+            return @()
+        }
+        else {
+            $sortedAgents = $agents | Sort-Object display_name
+            
+            if (-not $silent) {
+                $agentHeaderMsg = @"
+
+================================================================================
+AVAILABLE COLLECTORS/AGENTS
+================================================================================
+"@
+                Write-Host $agentHeaderMsg -ForegroundColor Green
+                $agentHeaderMsg | Out-File -FilePath $logFile -Append
+                
+                $index = 1
+                
+                foreach ($agent in $sortedAgents) {
+                    if ($numbered) {
+                        $agentLine = "  [$index] '$($agent.display_name)' (ID: $($agent.id))"
+                    }
+                    else {
+                        $agentLine = "  - '$($agent.display_name)' (ID: $($agent.id))"
+                    }
+                    Write-Host $agentLine
+                    $agentLine | Out-File -FilePath $logFile -Append
+                    $index++
+                }
+                
+                $agentSummaryMsg = "`nTotal: $($agents.Count) collector(s)/agent(s) found."
+                Write-Host $agentSummaryMsg -ForegroundColor Yellow
+                $agentSummaryMsg | Out-File -FilePath $logFile -Append
+            }
+            
+            return $sortedAgents
+        }
+    }
+    catch {
+        $agentErrorMsg = "`nERROR: Failed to retrieve collectors/agents - $_"
+        Write-Host $agentErrorMsg -ForegroundColor Red
+        $agentErrorMsg | Out-File -FilePath $logFile -Append
+        return @()
+    }
+}
+
+# Function to show help (usage only, no interactive workflow)
+function Show-Help {
+    $usageMessage = @"
+================================================================================
+        DOMOTZ INVENTORY OVERVIEWER - EXPORT TO EXCEL TOOL
+================================================================================
+
+USAGE: .\$PS_SCRIPT_NAME.ps1 [-operation <operation_type>] [additional parameters]
+
+================================================================================
+OPERATION TYPES
+================================================================================
+
+    list_collectors : List all available collectors/agents
+                      No additional parameters required
+
+    extract         : Extract data from Domotz and export to Excel (default)
+                      Optional: -collector_ids <ids> -device-type <types>
+
+================================================================================
+PARAMETERS
+================================================================================
+
+    -operation      : Operation to perform
+                      Values: "extract" (default), "list_collectors"
+
+    -collector_ids  : Filter by specific collector IDs (comma-separated)
+                      If not specified, all collectors are included
+                      NOTE: When specified, Organizations worksheet is not created
+                      Example: -collector_ids "312189,313759"
+
+    -device-type    : Filter device types (comma-separated)
+                      Values: "managed", "unmanaged", "managed,unmanaged" (default)
+
+    -filename       : Custom output Excel filename (optional)
+                      Example: -filename "my_export"
+
+    -debug          : Enable detailed logging
+
+================================================================================
+EXAMPLES
+================================================================================
+
+List all collectors:
+.\$PS_SCRIPT_NAME.ps1 -operation list_collectors
+
+Extract all data (organizations, collectors, devices):
+.\$PS_SCRIPT_NAME.ps1
+
+Extract data from specific collectors (no Organizations worksheet):
+.\$PS_SCRIPT_NAME.ps1 -collector_ids "312189,313759"
+
+Extract only managed devices:
+.\$PS_SCRIPT_NAME.ps1 -device-type managed
+
+Extract with custom filename:
+.\$PS_SCRIPT_NAME.ps1 -filename "domotz_export_2025"
+
+================================================================================
+OUTPUT
+================================================================================
+
+The script creates an Excel file with the following worksheets:
+
+- Organizations : List of organizations (only when -collector_ids is NOT specified)
+- Collectors    : List of collectors/agents
+- Devices       : List of devices with device-type column
+                  The device-type column indicates "managed" or "unmanaged"
+
+================================================================================
+"@
+    Write-Host $usageMessage -ForegroundColor Yellow
+    exit
+}
+
+# Function to show usage
+function Show-Usage {
+    $usageMessage = @"
+================================================================================
+        DOMOTZ INVENTORY OVERVIEWER - EXPORT TO EXCEL TOOL
+================================================================================
+
+USAGE: .\$PS_SCRIPT_NAME.ps1 [-operation <operation_type>] [additional parameters]
+
+================================================================================
+QUICK START
+================================================================================
+
+Extract all data (default):
+.\$PS_SCRIPT_NAME.ps1
+
+List available collectors:
+.\$PS_SCRIPT_NAME.ps1 -operation list_collectors
+
+For full help:
+.\$PS_SCRIPT_NAME.ps1 -help
+
+================================================================================
+"@
+    Write-Host $usageMessage -ForegroundColor Yellow
+    $usageMessage | Out-File -FilePath $logFile -Append
+}
+
+# Function to write log separator
+function Write-LogHeader {
+    $separator = "=" * 80
+    $timestamp = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
+    
+    @"
+
+$separator
+NEW EXECUTION - $timestamp
+Operation: $operation
+$separator
+
+"@ | Out-File -FilePath $logFile -Append
+}
+
+# Function to open Excel file
+function Open-Excel {
+    param (
+        [string]$fileName
+    )
+    
+    $message = "`n=== Opening Excel File ===`n"
+    Write-Host $message -ForegroundColor Magenta
+    $message | Out-File -FilePath $logFile -Append
+    
+    # Determine which file to open
+    if ([string]::IsNullOrEmpty($fileName)) {
+        $fileName = $DEFAULT_EXCEL_FILENAME
+    }
+    
+    # Add .xlsx extension if not present
+    if (-not $fileName.EndsWith(".xlsx")) {
+        $fileName = "$fileName.xlsx"
+    }
+    
+    $excelPath = Join-Path $PSScriptRoot $fileName
+    
+    if (-not (Test-Path $excelPath)) {
+        $errorMsg = "ERROR: File not found: $fileName"
+        Write-Host $errorMsg -ForegroundColor Red
+        $errorMsg | Out-File -FilePath $logFile -Append
+        throw "File not found: $excelPath"
+    }
+    
+    try {
+        $openMsg = "Opening file: $fileName"
+        Write-Host $openMsg -ForegroundColor Cyan
+        $openMsg | Out-File -FilePath $logFile -Append
+        
+        # Open the file with the default application
+        Start-Process $excelPath
+        
+        $successMsg = "[OK] Excel file opened successfully"
+        Write-Host $successMsg -ForegroundColor Green
+        $successMsg | Out-File -FilePath $logFile -Append
+    }
+    catch {
+        $errorMsg = "ERROR: Failed to open Excel file - $_"
+        Write-Host $errorMsg -ForegroundColor Red
+        $errorMsg | Out-File -FilePath $logFile -Append
+        throw $_
+    }
+}
+
+# Function to get managed devices for a collector
+function Get-ManagedDevices {
+    param (
+        [string]$collectorID,
+        [string]$collectorName
+    )
+    
+    try {
+        $apiEndpoint = "$baseURL/agent/$collectorID/device"
+        $headers = @{
+            "Accept"       = "application/json"
+            "Content-Type" = "application/json"
+            "X-Api-Key"    = $apiKey
+        }
+        
+        $response = Invoke-RestMethod -Uri $apiEndpoint -Headers $headers -Method Get
+        
+        # Add collector info and device-type to each device
+        $devices = @()
+        foreach ($device in $response) {
+            $device | Add-Member -NotePropertyName "_collector_id_" -NotePropertyValue $collectorID -Force
+            $device | Add-Member -NotePropertyName "_collector_name_" -NotePropertyValue $collectorName -Force
+            $device | Add-Member -NotePropertyName "_device_type_" -NotePropertyValue "managed" -Force
+            $devices += $device
+        }
+        
+        return $devices
+    }
+    catch {
+        $errorMessage = "ERROR: Failed to get managed devices for Collector ID $collectorID - $_"
+        Write-Host $errorMessage -ForegroundColor Red
+        $errorMessage | Out-File -FilePath $logFile -Append
+        return @()
+    }
+}
+
+# Function to get unmanaged devices for a collector
+function Get-UnmanagedDevices {
+    param (
+        [string]$collectorID,
+        [string]$collectorName
+    )
+    
+    try {
+        $apiEndpoint = "$baseURL/agent/$collectorID/device/monitoring-state/unmanaged"
+        $headers = @{
+            "Accept"       = "application/json"
+            "Content-Type" = "application/json"
+            "X-Api-Key"    = $apiKey
+        }
+        
+        $response = Invoke-RestMethod -Uri $apiEndpoint -Headers $headers -Method Get
+        
+        # Add collector info and device-type to each device
+        $devices = @()
+        foreach ($device in $response) {
+            $device | Add-Member -NotePropertyName "_collector_id_" -NotePropertyValue $collectorID -Force
+            $device | Add-Member -NotePropertyName "_collector_name_" -NotePropertyValue $collectorName -Force
+            $device | Add-Member -NotePropertyName "_device_type_" -NotePropertyValue "unmanaged" -Force
+            $devices += $device
+        }
+        
+        return $devices
+    }
+    catch {
+        $errorMessage = "ERROR: Failed to get unmanaged devices for Collector ID $collectorID - $_"
+        Write-Host $errorMessage -ForegroundColor Red
+        $errorMessage | Out-File -FilePath $logFile -Append
+        return @()
+    }
+}
+
+# Function to extract data and create Excel
+function Extract-Data {
+    param (
+        [string]$collectorIds,
+        [string]$deviceType,
+        [string]$fileName
+    )
+    
+    $message = "`n=== Extracting Domotz Data ===`n"
+    Write-Host $message -ForegroundColor Magenta
+    $message | Out-File -FilePath $logFile -Append
+    
+    # Always extract all object types, but Organizations only when collector_ids is NOT specified
+    $hasCollectorFilter = -not [string]::IsNullOrEmpty($collectorIds)
+    
+    if ($hasCollectorFilter) {
+        $objectTypes = @("collectors", "devices")
+        $filterNoteMsg = "[INFO] Collector filter specified - Organizations worksheet will be skipped"
+        Write-Host $filterNoteMsg -ForegroundColor Yellow
+        $filterNoteMsg | Out-File -FilePath $logFile -Append
+    }
+    else {
+        $objectTypes = @("organizations", "collectors", "devices")
+    }
+    
+    $objTypesMsg = "[INFO] Object types to extract: $($objectTypes -join ', ')"
+    Write-Host $objTypesMsg -ForegroundColor Cyan
+    $objTypesMsg | Out-File -FilePath $logFile -Append
+    
+    # Parse device-type parameter
+    if ([string]::IsNullOrEmpty($deviceType)) {
+        $deviceTypes = @("managed", "unmanaged")
+    }
+    else {
+        $deviceTypes = $deviceType.ToLower() -split ',' | ForEach-Object { $_.Trim() }
+    }
+    
+    if ($objectTypes -contains "devices") {
+        $devTypesMsg = "[INFO] Device types to extract: $($deviceTypes -join ', ')"
+        Write-Host $devTypesMsg -ForegroundColor Cyan
+        $devTypesMsg | Out-File -FilePath $logFile -Append
+    }
+    
+    # STEP 1: Get all collectors from API
+    $step1Msg = "`n[STEP 1] Retrieving collectors from Domotz API..."
+    Write-Host $step1Msg -ForegroundColor Cyan
+    $step1Msg | Out-File -FilePath $logFile -Append
+    
+    try {
+        $agentEndpoint = "$baseURL/agent"
+        $agentHeaders = @{
+            "X-Api-Key"    = $apiKey
+            "Accept"       = "application/json"
+            "Content-Type" = "application/json"
+        }
+        
+        $allCollectors = Invoke-RestMethod -Uri $agentEndpoint -Method Get -Headers $agentHeaders
+        
+        $foundMsg = "[OK] Retrieved $($allCollectors.Count) collector(s) from API"
+        Write-Host $foundMsg -ForegroundColor Green
+        $foundMsg | Out-File -FilePath $logFile -Append
+    }
+    catch {
+        $errorMsg = "ERROR: Failed to retrieve collectors from API - $_"
+        Write-Host $errorMsg -ForegroundColor Red
+        $errorMsg | Out-File -FilePath $logFile -Append
+        return
+    }
+    
+    # STEP 2: Filter collectors if collector_ids parameter is provided
+    $step2Msg = "`n[STEP 2] Filtering collectors..."
+    Write-Host $step2Msg -ForegroundColor Cyan
+    $step2Msg | Out-File -FilePath $logFile -Append
+    
+    if (-not [string]::IsNullOrEmpty($collectorIds)) {
+        $collectorIdArray = $collectorIds -split ',' | ForEach-Object { $_.Trim() }
+        $filteredCollectors = $allCollectors | Where-Object { $collectorIdArray -contains $_.id.ToString() }
+        
+        if ($filteredCollectors.Count -eq 0) {
+            $errorMsg = "ERROR: None of the specified collector IDs were found: $collectorIds"
+            Write-Host $errorMsg -ForegroundColor Red
+            $errorMsg | Out-File -FilePath $logFile -Append
+            
+            $availableMsg = "Available collector IDs:"
+            Write-Host $availableMsg -ForegroundColor Yellow
+            $availableMsg | Out-File -FilePath $logFile -Append
+            
+            foreach ($coll in $allCollectors) {
+                $collMsg = "  - $($coll.id): $($coll.display_name)"
+                Write-Host $collMsg
+                $collMsg | Out-File -FilePath $logFile -Append
+            }
+            return
+        }
+        
+        $filterMsg = "[OK] Filtered to $($filteredCollectors.Count) collector(s) based on -collector_ids parameter"
+        Write-Host $filterMsg -ForegroundColor Green
+        $filterMsg | Out-File -FilePath $logFile -Append
+        
+        $collectors = $filteredCollectors
+    }
+    else {
+        $noFilterMsg = "[INFO] No collector filter applied - using all $($allCollectors.Count) collector(s)"
+        Write-Host $noFilterMsg -ForegroundColor Cyan
+        $noFilterMsg | Out-File -FilePath $logFile -Append
+        $collectors = $allCollectors
+    }
+    
+    # Display collectors being processed
+    $collListMsg = "Collectors to process:"
+    Write-Host $collListMsg -ForegroundColor Yellow
+    $collListMsg | Out-File -FilePath $logFile -Append
+    
+    foreach ($coll in $collectors) {
+        $collLine = "  - ID: $($coll.id) - '$($coll.display_name)'"
+        Write-Host $collLine
+        $collLine | Out-File -FilePath $logFile -Append
+    }
+    
+    # STEP 3: Prepare data collections
+    $organizationsData = @()
+    $collectorsData = @()
+    $devicesData = @()
+    $totalManagedDevices = 0
+    $totalUnmanagedDevices = 0
+    
+    # STEP 3.1: Fetch managed device counts for all collectors (needed for Organizations and Collectors worksheets)
+    $step3aMsg = "`n[STEP 3] Fetching managed device counts for all collectors..."
+    Write-Host $step3aMsg -ForegroundColor Cyan
+    $step3aMsg | Out-File -FilePath $logFile -Append
+    
+    $managedDeviceCountByCollector = @{}
+    foreach ($coll in $collectors) {
+        $countMsg = "  Counting managed devices for collector: $($coll.display_name) (ID: $($coll.id))"
+        Write-Host $countMsg -ForegroundColor Gray
+        $countMsg | Out-File -FilePath $logFile -Append
+        
+        try {
+            $apiEndpoint = "$baseURL/agent/$($coll.id)/device"
+            $headers = @{
+                "Accept"       = "application/json"
+                "Content-Type" = "application/json"
+                "X-Api-Key"    = $apiKey
+            }
+            
+            $managedDevicesResponse = Invoke-RestMethod -Uri $apiEndpoint -Headers $headers -Method Get
+            $managedDeviceCountByCollector[$coll.id] = $managedDevicesResponse.Count
+            
+            $countResultMsg = "    [OK] Found $($managedDevicesResponse.Count) managed device(s)"
+            Write-Host $countResultMsg -ForegroundColor Green
+            $countResultMsg | Out-File -FilePath $logFile -Append
+        }
+        catch {
+            $managedDeviceCountByCollector[$coll.id] = 0
+            $countErrorMsg = "    [WARNING] Failed to count managed devices: $_"
+            Write-Host $countErrorMsg -ForegroundColor Yellow
+            $countErrorMsg | Out-File -FilePath $logFile -Append
+        }
+    }
+    
+    # STEP 4: Extract Organizations data
+    if ($objectTypes -contains "organizations") {
+        $step4Msg = "`n[STEP 4] Extracting Organizations data..."
+        Write-Host $step4Msg -ForegroundColor Cyan
+        $step4Msg | Out-File -FilePath $logFile -Append
+        
+        # Extract unique organizations from collectors
+        $orgMap = @{}
+        foreach ($coll in $collectors) {
+            if ($coll.organization -and $coll.organization.id) {
+                $orgId = $coll.organization.id
+                $collectorManagedCount = $managedDeviceCountByCollector[$coll.id]
+                
+                if (-not $orgMap.ContainsKey($orgId)) {
+                    $orgMap[$orgId] = [PSCustomObject]@{
+                        "organization_id"           = $coll.organization.id
+                        "organization_name"         = $coll.organization.name
+                        "collector_count"           = 1
+                        "collector_ids"             = @($coll.id)
+                        "collector_names"           = @($coll.display_name)
+                        "number_of_managed_devices" = $collectorManagedCount
+                    }
+                }
+                else {
+                    $orgMap[$orgId].collector_count++
+                    $orgMap[$orgId].collector_ids += $coll.id
+                    $orgMap[$orgId].collector_names += $coll.display_name
+                    $orgMap[$orgId].number_of_managed_devices += $collectorManagedCount
+                }
+            }
+        }
+        
+        # Convert to flat data for Excel
+        foreach ($orgId in $orgMap.Keys) {
+            $org = $orgMap[$orgId]
+            $organizationsData += [PSCustomObject]@{
+                "organization_id"           = $org.organization_id
+                "organization_name"         = $org.organization_name
+                "collector_count"           = $org.collector_count
+                "number_of_managed_devices" = $org.number_of_managed_devices
+                "collector_ids"             = ($org.collector_ids -join "`n")
+                "collector_names"           = ($org.collector_names -join "`n")
+            }
+        }
+        
+        $orgMsg = "[OK] Extracted $($organizationsData.Count) organization(s)"
+        Write-Host $orgMsg -ForegroundColor Green
+        $orgMsg | Out-File -FilePath $logFile -Append
+    }
+    
+    # STEP 5: Extract Collectors data
+    if ($objectTypes -contains "collectors") {
+        $step5Msg = "`n[STEP 5] Extracting Collectors data..."
+        Write-Host $step5Msg -ForegroundColor Cyan
+        $step5Msg | Out-File -FilePath $logFile -Append
+        
+        foreach ($coll in $collectors) {
+            $collectorRow = [PSCustomObject]@{
+                "collector_id"              = $coll.id
+                "display_name"              = $coll.display_name
+                "number_of_managed_devices" = $managedDeviceCountByCollector[$coll.id]
+                "status"                    = if ($coll.status) { $coll.status.value } else { "" }
+                "status_last_change"        = if ($coll.status) { $coll.status.last_change } else { "" }
+                "creation_time"             = $coll.creation_time
+                "timezone"                  = $coll.timezone
+                "agent_version"             = if ($coll.version) { $coll.version.agent } else { "" }
+                "package_version"           = if ($coll.version) { $coll.version.package } else { "" }
+                "organization_id"           = if ($coll.organization) { $coll.organization.id } else { "" }
+                "organization_name"         = if ($coll.organization) { $coll.organization.name } else { "" }
+                "licence_id"                = if ($coll.licence) { $coll.licence.id } else { "" }
+                "licence_code"              = if ($coll.licence) { $coll.licence.code } else { "" }
+                "licence_type"              = if ($coll.licence) { $coll.licence.type } else { "" }
+                "licence_activation"        = if ($coll.licence) { $coll.licence.activation_time } else { "" }
+                "bound_mac_address"         = if ($coll.licence) { $coll.licence.bound_mac_address } else { "" }
+                "access_status"             = if ($coll.access_right) { $coll.access_right.status } else { "" }
+                "api_enabled"               = if ($coll.access_right) { $coll.access_right.api_enabled } else { "" }
+                "latitude"                  = if ($coll.location) { $coll.location.latitude } else { "" }
+                "longitude"                 = if ($coll.location) { $coll.location.longitude } else { "" }
+                "wan_ip"                    = if ($coll.wan_info) { $coll.wan_info.ip } else { "" }
+                "wan_hostname"              = if ($coll.wan_info) { $coll.wan_info.hostname } else { "" }
+            }
+            $collectorsData += $collectorRow
+        }
+        
+        $collDataMsg = "[OK] Extracted $($collectorsData.Count) collector(s)"
+        Write-Host $collDataMsg -ForegroundColor Green
+        $collDataMsg | Out-File -FilePath $logFile -Append
+    }
+    
+    # STEP 6: Extract Devices data
+    if ($objectTypes -contains "devices") {
+        $step6Msg = "`n[STEP 6] Extracting Devices data..."
+        Write-Host $step6Msg -ForegroundColor Cyan
+        $step6Msg | Out-File -FilePath $logFile -Append
+        
+        $totalManagedDevices = 0
+        $totalUnmanagedDevices = 0
+        
+        foreach ($coll in $collectors) {
+            $collDevMsg = "  Processing collector: $($coll.display_name) (ID: $($coll.id))"
+            Write-Host $collDevMsg -ForegroundColor Yellow
+            $collDevMsg | Out-File -FilePath $logFile -Append
+            
+            # Get managed devices
+            if ($deviceTypes -contains "managed") {
+                $managedDevices = Get-ManagedDevices -collectorID $coll.id -collectorName $coll.display_name
+                
+                foreach ($device in $managedDevices) {
+                    $deviceRow = [PSCustomObject]@{
+                        "collector_id"       = $coll.id
+                        "collector_name"     = $coll.display_name
+                        "device_id"          = $device.id
+                        "display_name"       = $device.display_name
+                        "device_type"        = "managed"
+                        "status"             = $device.status
+                        "last_status_change" = $device.last_status_change
+                        "ip_addresses"       = if ($device.ip_addresses) { $device.ip_addresses -join ", " } else { "" }
+                        "hw_address"         = $device.hw_address
+                        "vendor"             = $device.vendor
+                        "model"              = $device.model
+                        "protocol"           = $device.protocol
+                        "type_id"            = if ($device.type) { $device.type.id } else { "" }
+                        "type_label"         = if ($device.type) { $device.type.label } else { "" }
+                        "type_detected_id"   = if ($device.type) { $device.type.detected_id } else { "" }
+                        "snmp_status"        = $device.snmp_status
+                        "importance"         = $device.importance
+                        "first_seen_on"      = $device.first_seen_on
+                        "agent_reachable"    = $device.agent_reachable
+                        "is_excluded"        = $device.is_excluded
+                        "is_jammed"          = $device.is_jammed
+                        "grace_period"       = $device.grace_period
+                        "organization_id"    = if ($device.organization) { $device.organization.id } else { "" }
+                        "organization_name"  = if ($device.organization) { $device.organization.name } else { "" }
+                        "zone"               = if ($device.details) { $device.details.zone } else { "" }
+                        "room"               = if ($device.details) { $device.details.room } else { "" }
+                        "serial"             = if ($device.details) { $device.details.serial } else { "" }
+                        "firmware_version"   = if ($device.details) { $device.details.firmware_version } else { "" }
+                        "notes"              = if ($device.details) { $device.details.notes } else { "" }
+                        "host_name"          = if ($device.names) { $device.names.host } else { "" }
+                        "bonjour_name"       = if ($device.names) { $device.names.bonjour } else { "" }
+                        "upnp_name"          = if ($device.names) { $device.names.upnp } else { "" }
+                        "netbios_name"       = if ($device.names) { $device.names.netbios } else { "" }
+                        "tcp_ports"          = if ($device.open_ports -and $device.open_ports.tcp) { $device.open_ports.tcp -join ", " } else { "" }
+                        "udp_ports"          = if ($device.open_ports -and $device.open_ports.udp) { $device.open_ports.udp -join ", " } else { "" }
+                    }
+                    $devicesData += $deviceRow
+                }
+                
+                $totalManagedDevices += $managedDevices.Count
+                $managedMsg = "    [OK] Found $($managedDevices.Count) managed device(s)"
+                Write-Host $managedMsg -ForegroundColor Green
+                $managedMsg | Out-File -FilePath $logFile -Append
+            }
+            
+            # Get unmanaged devices
+            if ($deviceTypes -contains "unmanaged") {
+                $unmanagedDevices = Get-UnmanagedDevices -collectorID $coll.id -collectorName $coll.display_name
+                
+                foreach ($device in $unmanagedDevices) {
+                    $deviceRow = [PSCustomObject]@{
+                        "collector_id"       = $coll.id
+                        "collector_name"     = $coll.display_name
+                        "device_id"          = $device.id
+                        "display_name"       = $device.display_name
+                        "device_type"        = "unmanaged"
+                        "status"             = ""
+                        "last_status_change" = ""
+                        "ip_addresses"       = if ($device.ip_addresses) { $device.ip_addresses -join ", " } else { "" }
+                        "hw_address"         = $device.mac
+                        "vendor"             = $device.vendor
+                        "model"              = ""
+                        "protocol"           = $device.protocol
+                        "type_id"            = if ($device.type) { $device.type.id } else { "" }
+                        "type_label"         = if ($device.type) { $device.type.label } else { "" }
+                        "type_detected_id"   = if ($device.type) { $device.type.detected_id } else { "" }
+                        "snmp_status"        = ""
+                        "importance"         = ""
+                        "first_seen_on"      = $device.first_seen_on
+                        "agent_reachable"    = ""
+                        "is_excluded"        = ""
+                        "is_jammed"          = ""
+                        "grace_period"       = ""
+                        "organization_id"    = ""
+                        "organization_name"  = ""
+                        "zone"               = ""
+                        "room"               = ""
+                        "serial"             = ""
+                        "firmware_version"   = ""
+                        "notes"              = ""
+                        "host_name"          = ""
+                        "bonjour_name"       = ""
+                        "upnp_name"          = ""
+                        "netbios_name"       = ""
+                        "tcp_ports"          = ""
+                        "udp_ports"          = ""
+                    }
+                    $devicesData += $deviceRow
+                }
+                
+                $totalUnmanagedDevices += $unmanagedDevices.Count
+                $unmanagedMsg = "    [OK] Found $($unmanagedDevices.Count) unmanaged device(s)"
+                Write-Host $unmanagedMsg -ForegroundColor Green
+                $unmanagedMsg | Out-File -FilePath $logFile -Append
+            }
+        }
+        
+        $devSummaryMsg = "[OK] Total devices extracted: $($devicesData.Count) (Managed: $totalManagedDevices, Unmanaged: $totalUnmanagedDevices)"
+        Write-Host $devSummaryMsg -ForegroundColor Green
+        $devSummaryMsg | Out-File -FilePath $logFile -Append
+    }
+    
+    # STEP 7: Determine file name and handle existing files
+    $step7Msg = "`n[STEP 6] Creating Excel file..."
+    Write-Host $step7Msg -ForegroundColor Cyan
+    $step7Msg | Out-File -FilePath $logFile -Append
+    
+    # Determine base file name
+    if ([string]::IsNullOrEmpty($fileName)) {
+        $baseFileName = $DEFAULT_EXCEL_BASENAME
+    }
+    else {
+        # Remove .xlsx extension if provided
+        $baseFileName = $fileName -replace '\.xlsx$', ''
+    }
+    
+    $targetFileName = "$baseFileName.xlsx"
+    $targetFilePath = Join-Path $PSScriptRoot $targetFileName
+    
+    $fileExistsMessage = ""
+    
+    # Check if file exists and create timestamped version if needed
+    if (Test-Path $targetFilePath) {
+        $timestamp = Get-Date -Format "yyyy-MMM-dd_HH-mm-ss"
+        $targetFileName = "${baseFileName}_${timestamp}.xlsx"
+        $targetFilePath = Join-Path $PSScriptRoot $targetFileName
+        
+        $fileExistsMessage = @"
+
+[NOTICE] The file '$baseFileName.xlsx' already exists.
+         Creating new file with timestamp: $targetFileName
+"@
+        Write-Host $fileExistsMessage -ForegroundColor Yellow
+        $fileExistsMessage | Out-File -FilePath $logFile -Append
+    }
+    
+    $creatingMsg = "  Creating Excel file: $targetFileName"
+    Write-Host $creatingMsg -ForegroundColor Cyan
+    $creatingMsg | Out-File -FilePath $logFile -Append
+    
+    # STEP 8: Create Excel file with worksheets
+    try {
+        Import-Module ImportExcel -ErrorAction Stop
+        
+        $worksheetCount = 0
+        
+        # Create Organizations worksheet
+        if ($objectTypes -contains "organizations" -and $organizationsData.Count -gt 0) {
+            $organizationsData | Export-Excel -Path $targetFilePath -WorksheetName "Organizations" -FreezeTopRow -BoldTopRow
+            $worksheetCount++
+            
+            # Apply formatting to Organizations worksheet
+            $excel = Open-ExcelPackage -Path $targetFilePath
+            $orgWorksheet = $excel.Workbook.Worksheets["Organizations"]
+            
+            if ($orgWorksheet) {
+                $lastRow = $orgWorksheet.Dimension.Rows
+                $lastCol = $orgWorksheet.Dimension.Columns
+                
+                # Apply Text format, vertical middle alignment, and left horizontal alignment to all cells
+                for ($row = 1; $row -le $lastRow; $row++) {
+                    for ($col = 1; $col -le $lastCol; $col++) {
+                        $orgWorksheet.Cells[$row, $col].Style.VerticalAlignment = [OfficeOpenXml.Style.ExcelVerticalAlignment]::Center
+                        $orgWorksheet.Cells[$row, $col].Style.HorizontalAlignment = [OfficeOpenXml.Style.ExcelHorizontalAlignment]::Left
+                        $orgWorksheet.Cells[$row, $col].Style.Numberformat.Format = "@"
+                    }
+                }
+                
+                # Find collector_ids and collector_names column indices
+                $collectorIdsCol = 0
+                $collectorNamesCol = 0
+                
+                for ($col = 1; $col -le $lastCol; $col++) {
+                    $headerValue = $orgWorksheet.Cells[1, $col].Value
+                    if ($headerValue -eq "collector_ids") {
+                        $collectorIdsCol = $col
+                    }
+                    elseif ($headerValue -eq "collector_names") {
+                        $collectorNamesCol = $col
+                    }
+                }
+                
+                # Apply wrap text to collector_ids column
+                if ($collectorIdsCol -gt 0) {
+                    for ($row = 2; $row -le $lastRow; $row++) {
+                        $orgWorksheet.Cells[$row, $collectorIdsCol].Style.WrapText = $true
+                    }
+                    # Set a reasonable column width
+                    $orgWorksheet.Column($collectorIdsCol).Width = 15
+                }
+                
+                # Apply wrap text to collector_names column
+                if ($collectorNamesCol -gt 0) {
+                    for ($row = 2; $row -le $lastRow; $row++) {
+                        $orgWorksheet.Cells[$row, $collectorNamesCol].Style.WrapText = $true
+                    }
+                    # Set a reasonable column width
+                    $orgWorksheet.Column($collectorNamesCol).Width = 45
+                }
+                
+                # AutoFit other columns
+                for ($col = 1; $col -le $lastCol; $col++) {
+                    if ($col -ne $collectorIdsCol -and $col -ne $collectorNamesCol) {
+                        $orgWorksheet.Column($col).AutoFit()
+                    }
+                }
+            }
+            
+            $excel.Save()
+            $excel.Dispose()
+            
+            $orgWsMsg = "  [OK] Created 'Organizations' worksheet with $($organizationsData.Count) row(s)"
+            Write-Host $orgWsMsg -ForegroundColor Green
+            $orgWsMsg | Out-File -FilePath $logFile -Append
+        }
+        
+        # Create Collectors worksheet
+        if ($objectTypes -contains "collectors" -and $collectorsData.Count -gt 0) {
+            if ($worksheetCount -eq 0) {
+                $collectorsData | Export-Excel -Path $targetFilePath -WorksheetName "Collectors" -AutoSize -FreezeTopRow -BoldTopRow
+            }
+            else {
+                $collectorsData | Export-Excel -Path $targetFilePath -WorksheetName "Collectors" -AutoSize -FreezeTopRow -BoldTopRow -Append
+            }
+            $worksheetCount++
+            
+            # Apply formatting to Collectors worksheet
+            $excel = Open-ExcelPackage -Path $targetFilePath
+            $collWorksheet = $excel.Workbook.Worksheets["Collectors"]
+            
+            if ($collWorksheet) {
+                $lastRow = $collWorksheet.Dimension.Rows
+                $lastCol = $collWorksheet.Dimension.Columns
+                
+                # Apply Text format, vertical middle alignment, and left horizontal alignment to all cells
+                for ($row = 1; $row -le $lastRow; $row++) {
+                    for ($col = 1; $col -le $lastCol; $col++) {
+                        $collWorksheet.Cells[$row, $col].Style.VerticalAlignment = [OfficeOpenXml.Style.ExcelVerticalAlignment]::Center
+                        $collWorksheet.Cells[$row, $col].Style.HorizontalAlignment = [OfficeOpenXml.Style.ExcelHorizontalAlignment]::Left
+                        $collWorksheet.Cells[$row, $col].Style.Numberformat.Format = "@"
+                    }
+                }
+                
+                # Build column name to index mapping
+                $columnMap = @{}
+                for ($col = 1; $col -le $lastCol; $col++) {
+                    $headerName = $collWorksheet.Cells[1, $col].Value
+                    if ($headerName) {
+                        $columnMap[$headerName] = $col
+                    }
+                }
+                
+                # Apply hyperlinks to display_name column
+                if ($columnMap.ContainsKey("display_name") -and $columnMap.ContainsKey("collector_id")) {
+                    $displayNameColNum = $columnMap["display_name"]
+                    $collectorIdColNum = $columnMap["collector_id"]
+                    
+                    $hyperlinkCount = 0
+                    $hyperlinkMsg = "  [INFO] Adding hyperlinks to collector display_name column..."
+                    Write-Host $hyperlinkMsg -ForegroundColor Cyan
+                    $hyperlinkMsg | Out-File -FilePath $logFile -Append
+                    
+                    for ($row = 2; $row -le $lastRow; $row++) {
+                        $displayNameCell = $collWorksheet.Cells[$row, $displayNameColNum]
+                        $collectorIdCell = $collWorksheet.Cells[$row, $collectorIdColNum]
+                        
+                        $displayName = $displayNameCell.Value
+                        $collectorId = $collectorIdCell.Value
+                        
+                        if ($displayName -and $collectorId) {
+                            # Build the Domotz portal URL for collector devices
+                            $collectorUrl = "https://portal.domotz.com/webapp/agent/$collectorId/devices"
+                            
+                            # Create hyperlink using EPPlus
+                            try {
+                                $uri = New-Object System.Uri($collectorUrl)
+                                $displayNameCell.Hyperlink = $uri
+                                $displayNameCell.Value = $displayName
+                                # Style the hyperlink (blue and underlined)
+                                $displayNameCell.Style.Font.Color.SetColor([System.Drawing.Color]::Blue)
+                                $displayNameCell.Style.Font.UnderLine = $true
+                                $hyperlinkCount++
+                            }
+                            catch {
+                                $linkErrorMsg = "    [WARNING] Failed to add hyperlink for row $row`: $_"
+                                Write-Host $linkErrorMsg -ForegroundColor Yellow
+                                $linkErrorMsg | Out-File -FilePath $logFile -Append
+                            }
+                        }
+                    }
+                    
+                    $hyperlinkDoneMsg = "  [OK] Added $hyperlinkCount hyperlinks to collector names"
+                    Write-Host $hyperlinkDoneMsg -ForegroundColor Green
+                    $hyperlinkDoneMsg | Out-File -FilePath $logFile -Append
+                }
+                
+                # Ensure bound_mac_address column is NOT styled as hyperlink (black text, no underline)
+                if ($columnMap.ContainsKey("bound_mac_address")) {
+                    $macColNum = $columnMap["bound_mac_address"]
+                    for ($row = 2; $row -le $lastRow; $row++) {
+                        $macCell = $collWorksheet.Cells[$row, $macColNum]
+                        $macCell.Style.Font.Color.SetColor([System.Drawing.Color]::Black)
+                        $macCell.Style.Font.UnderLine = $false
+                    }
+                }
+            }
+            
+            $excel.Save()
+            $excel.Dispose()
+            
+            $collWsMsg = "  [OK] Created 'Collectors' worksheet with $($collectorsData.Count) row(s)"
+            Write-Host $collWsMsg -ForegroundColor Green
+            $collWsMsg | Out-File -FilePath $logFile -Append
+        }
+        
+        # Create Devices worksheet
+        if ($objectTypes -contains "devices" -and $devicesData.Count -gt 0) {
+            if ($worksheetCount -eq 0) {
+                $devicesData | Export-Excel -Path $targetFilePath -WorksheetName "Devices" -AutoSize -FreezeTopRow -BoldTopRow
+            }
+            else {
+                $devicesData | Export-Excel -Path $targetFilePath -WorksheetName "Devices" -AutoSize -FreezeTopRow -BoldTopRow -Append
+            }
+            $worksheetCount++
+            
+            # Apply formatting to Devices worksheet
+            $excel = Open-ExcelPackage -Path $targetFilePath
+            $devWorksheet = $excel.Workbook.Worksheets["Devices"]
+            
+            if ($devWorksheet) {
+                $lastRow = $devWorksheet.Dimension.Rows
+                $lastCol = $devWorksheet.Dimension.Columns
+                
+                # Apply Text format, vertical middle alignment, and left horizontal alignment to all cells
+                for ($row = 1; $row -le $lastRow; $row++) {
+                    for ($col = 1; $col -le $lastCol; $col++) {
+                        $devWorksheet.Cells[$row, $col].Style.VerticalAlignment = [OfficeOpenXml.Style.ExcelVerticalAlignment]::Center
+                        $devWorksheet.Cells[$row, $col].Style.HorizontalAlignment = [OfficeOpenXml.Style.ExcelHorizontalAlignment]::Left
+                        $devWorksheet.Cells[$row, $col].Style.Numberformat.Format = "@"
+                    }
+                }
+                
+                # Build column name to index mapping
+                $columnMap = @{}
+                for ($col = 1; $col -le $lastCol; $col++) {
+                    $headerName = $devWorksheet.Cells[1, $col].Value
+                    if ($headerName) {
+                        $columnMap[$headerName] = $col
+                    }
+                }
+                
+                # Get device_type column index for unmanaged device styling
+                $deviceTypeColNum = if ($columnMap.ContainsKey("device_type")) { $columnMap["device_type"] } else { 0 }
+                
+                # Define colors for unmanaged devices
+                $darkGreyColor = [System.Drawing.Color]::FromArgb(96, 96, 96)  # Dark grey for text
+                $lightGreyFill = [System.Drawing.Color]::FromArgb(230, 230, 230)  # Light grey for empty cell fill
+                
+                # Apply styling to unmanaged devices and hyperlinks to all devices
+                if ($columnMap.ContainsKey("display_name") -and $columnMap.ContainsKey("collector_id") -and $columnMap.ContainsKey("device_id")) {
+                    $displayNameColNum = $columnMap["display_name"]
+                    $collectorIdColNum = $columnMap["collector_id"]
+                    $deviceIdColNum = $columnMap["device_id"]
+                    
+                    $hyperlinkCount = 0
+                    $unmanagedCount = 0
+                    $hyperlinkMsg = "  [INFO] Adding hyperlinks and styling devices..."
+                    Write-Host $hyperlinkMsg -ForegroundColor Cyan
+                    $hyperlinkMsg | Out-File -FilePath $logFile -Append
+                    
+                    for ($row = 2; $row -le $lastRow; $row++) {
+                        $displayNameCell = $devWorksheet.Cells[$row, $displayNameColNum]
+                        $collectorIdCell = $devWorksheet.Cells[$row, $collectorIdColNum]
+                        $deviceIdCell = $devWorksheet.Cells[$row, $deviceIdColNum]
+                        
+                        $displayName = $displayNameCell.Value
+                        $collectorId = $collectorIdCell.Value
+                        $deviceId = $deviceIdCell.Value
+                        
+                        # Check if this is an unmanaged device
+                        $isUnmanaged = $false
+                        if ($deviceTypeColNum -gt 0) {
+                            $deviceTypeValue = $devWorksheet.Cells[$row, $deviceTypeColNum].Value
+                            $isUnmanaged = ($deviceTypeValue -eq "unmanaged")
+                        }
+                        
+                        # Apply unmanaged device styling
+                        if ($isUnmanaged) {
+                            $unmanagedCount++
+                            for ($col = 1; $col -le $lastCol; $col++) {
+                                $cell = $devWorksheet.Cells[$row, $col]
+                                $cellValue = $cell.Value
+                                
+                                # Apply dark grey text color to all cells in the row
+                                $cell.Style.Font.Color.SetColor($darkGreyColor)
+                                
+                                # Apply light grey fill to empty cells
+                                if ([string]::IsNullOrWhiteSpace($cellValue)) {
+                                    $cell.Style.Fill.PatternType = [OfficeOpenXml.Style.ExcelFillStyle]::Solid
+                                    $cell.Style.Fill.BackgroundColor.SetColor($lightGreyFill)
+                                }
+                            }
+                        }
+                        
+                        # Add hyperlink to display_name
+                        if ($displayName -and $collectorId -and $deviceId) {
+                            # Build the Domotz portal URL
+                            $deviceUrl = "https://portal.domotz.com/webapp/agent/$collectorId/devices/$deviceId/details?tab=info"
+                            
+                            # Create hyperlink using EPPlus
+                            try {
+                                # Create a proper URI object and set it as hyperlink
+                                $uri = New-Object System.Uri($deviceUrl)
+                                $displayNameCell.Hyperlink = $uri
+                                # Keep the display text as the device name
+                                $displayNameCell.Value = $displayName
+                                # Style the hyperlink (blue and underlined) - but darker blue for unmanaged
+                                if ($isUnmanaged) {
+                                    $displayNameCell.Style.Font.Color.SetColor([System.Drawing.Color]::FromArgb(70, 70, 140))  # Dark blue-grey
+                                }
+                                else {
+                                    $displayNameCell.Style.Font.Color.SetColor([System.Drawing.Color]::Blue)
+                                }
+                                $displayNameCell.Style.Font.UnderLine = $true
+                                $hyperlinkCount++
+                            }
+                            catch {
+                                $linkErrorMsg = "    [WARNING] Failed to add hyperlink for row $row`: $_"
+                                Write-Host $linkErrorMsg -ForegroundColor Yellow
+                                $linkErrorMsg | Out-File -FilePath $logFile -Append
+                            }
+                        }
+                    }
+                    
+                    $hyperlinkDoneMsg = "  [OK] Added $hyperlinkCount hyperlinks to device names"
+                    Write-Host $hyperlinkDoneMsg -ForegroundColor Green
+                    $hyperlinkDoneMsg | Out-File -FilePath $logFile -Append
+                    
+                    if ($unmanagedCount -gt 0) {
+                        $unmanagedMsg = "  [OK] Styled $unmanagedCount unmanaged device rows (dark grey text, grey fill for empty cells)"
+                        Write-Host $unmanagedMsg -ForegroundColor Green
+                        $unmanagedMsg | Out-File -FilePath $logFile -Append
+                    }
+                }
+                
+                # Ensure hw_address column is NOT styled as hyperlink (restore proper text color, no underline)
+                if ($columnMap.ContainsKey("hw_address")) {
+                    $hwAddrColNum = $columnMap["hw_address"]
+                    for ($row = 2; $row -le $lastRow; $row++) {
+                        $hwCell = $devWorksheet.Cells[$row, $hwAddrColNum]
+                        
+                        # Check if this row is unmanaged (keep dark grey) or managed (use black)
+                        $isUnmanagedRow = $false
+                        if ($deviceTypeColNum -gt 0) {
+                            $deviceTypeValue = $devWorksheet.Cells[$row, $deviceTypeColNum].Value
+                            $isUnmanagedRow = ($deviceTypeValue -eq "unmanaged")
+                        }
+                        
+                        if ($isUnmanagedRow) {
+                            $hwCell.Style.Font.Color.SetColor($darkGreyColor)
+                        }
+                        else {
+                            $hwCell.Style.Font.Color.SetColor([System.Drawing.Color]::Black)
+                        }
+                        $hwCell.Style.Font.UnderLine = $false
+                    }
+                }
+            }
+            
+            $excel.Save()
+            $excel.Dispose()
+            
+            $devWsMsg = "  [OK] Created 'Devices' worksheet with $($devicesData.Count) row(s)"
+            Write-Host $devWsMsg -ForegroundColor Green
+            $devWsMsg | Out-File -FilePath $logFile -Append
+        }
+        
+        if ($worksheetCount -eq 0) {
+            $noDataMsg = "[WARNING] No data was extracted. Excel file not created."
+            Write-Host $noDataMsg -ForegroundColor Yellow
+            $noDataMsg | Out-File -FilePath $logFile -Append
+            return
+        }
+        
+        # Apply final formatting to all worksheets: borders, filters, and set active worksheet
+        $finalFormatMsg = "  [INFO] Applying final formatting (borders, filters, active worksheet)..."
+        Write-Host $finalFormatMsg -ForegroundColor Cyan
+        $finalFormatMsg | Out-File -FilePath $logFile -Append
+        
+        $excel = Open-ExcelPackage -Path $targetFilePath
+        
+        # Define border style
+        $borderStyle = [OfficeOpenXml.Style.ExcelBorderStyle]::Thin
+        $borderColor = [System.Drawing.Color]::Black
+        
+        foreach ($worksheet in $excel.Workbook.Worksheets) {
+            if ($worksheet.Dimension) {
+                $lastRow = $worksheet.Dimension.Rows
+                $lastCol = $worksheet.Dimension.Columns
+                
+                # Apply borders to all cells
+                $dataRange = $worksheet.Cells[1, 1, $lastRow, $lastCol]
+                $dataRange.Style.Border.Top.Style = $borderStyle
+                $dataRange.Style.Border.Bottom.Style = $borderStyle
+                $dataRange.Style.Border.Left.Style = $borderStyle
+                $dataRange.Style.Border.Right.Style = $borderStyle
+                $dataRange.Style.Border.Top.Color.SetColor($borderColor)
+                $dataRange.Style.Border.Bottom.Color.SetColor($borderColor)
+                $dataRange.Style.Border.Left.Color.SetColor($borderColor)
+                $dataRange.Style.Border.Right.Color.SetColor($borderColor)
+                
+                # Apply AutoFilter to the first row (header row)
+                $headerRange = $worksheet.Cells[1, 1, 1, $lastCol]
+                $worksheet.Cells[$headerRange.Address].AutoFilter = $true
+                
+                # Apply yellow fill color to the header row (first row)
+                $headerRange.Style.Fill.PatternType = [OfficeOpenXml.Style.ExcelFillStyle]::Solid
+                $headerRange.Style.Fill.BackgroundColor.SetColor([System.Drawing.Color]::Yellow)
+            }
+        }
+        
+        # Set the Devices worksheet as active (if it exists)
+        $devicesWorksheet = $excel.Workbook.Worksheets["Devices"]
+        if ($devicesWorksheet) {
+            $excel.Workbook.View.ActiveTab = $excel.Workbook.Worksheets.Count - 1  # Devices is last
+            $devicesWorksheet.View.TabSelected = $true
+            
+            # Deselect other worksheets
+            foreach ($ws in $excel.Workbook.Worksheets) {
+                if ($ws.Name -ne "Devices") {
+                    $ws.View.TabSelected = $false
+                }
+            }
+        }
+        
+        $excel.Save()
+        $excel.Dispose()
+        
+        $formatDoneMsg = "  [OK] Applied borders, filters, and set Devices as active worksheet"
+        Write-Host $formatDoneMsg -ForegroundColor Green
+        $formatDoneMsg | Out-File -FilePath $logFile -Append
+        
+        # Display summary
+        $summaryMsg = @"
+
+================================================================================
+                          EXTRACTION SUMMARY                                    
+================================================================================
+
+Collectors Processed: $($collectors.Count)
+"@
+        
+        if ($objectTypes -contains "organizations") {
+            $summaryMsg += "`nOrganizations: $($organizationsData.Count)"
+        }
+        else {
+            $summaryMsg += "`nOrganizations: Skipped (collector filter applied)"
+        }
+        $summaryMsg += "`nCollectors: $($collectorsData.Count)"
+        $summaryMsg += "`nDevices: $($devicesData.Count) (Managed: $totalManagedDevices, Unmanaged: $totalUnmanagedDevices)"
+        
+        $summaryMsg += @"
+
+Output File: $targetFileName
+Worksheets Created: $worksheetCount
+
+$fileExistsMessage
+
+================================================================================
+"@
+        Write-Host $summaryMsg -ForegroundColor Green
+        $summaryMsg | Out-File -FilePath $logFile -Append
+        
+        # Open the Excel file
+        Open-Excel -fileName $targetFileName
+    }
+    catch {
+        $errorMsg = "ERROR: Failed to create Excel file - $_"
+        Write-Host $errorMsg -ForegroundColor Red
+        $errorMsg | Out-File -FilePath $logFile -Append
+        throw $_
+    }
+}
+
+# Check if help parameter is provided
+if ($help -or $script:showHelpOnly) {
+    Show-Help
+}
+
+# Check for invalid/unknown parameters
+if ($script:hasInvalidParams) {
+    $errorHeader = @"
+
+================================================================================
+                                    ERROR                                       
+================================================================================
+"@
+    Write-Host $errorHeader -ForegroundColor Red
+    
+    $errorMessage = "Unknown parameter(s) detected: $($script:invalidParamsList -join ', ')"
+    Write-Host $errorMessage -ForegroundColor Red
+    Write-Host ""
+    
+    $validParamsMsg = "Valid parameters are:"
+    Write-Host $validParamsMsg -ForegroundColor Yellow
+    Write-Host "  -operation      : extract, list_collectors" -ForegroundColor Cyan
+    Write-Host "  -collector_ids  : comma-separated list of collector IDs" -ForegroundColor Cyan
+    Write-Host "  -device-type    : managed, unmanaged, or managed,unmanaged" -ForegroundColor Cyan
+    Write-Host "  -filename       : custom output Excel filename" -ForegroundColor Cyan
+    Write-Host "  -debug          : enable detailed logging" -ForegroundColor Cyan
+    Write-Host "  -help (-h, -?)  : show help" -ForegroundColor Cyan
+    Write-Host ""
+    
+    Show-Help
+}
+
+# Set default values for parameters
+if ([string]::IsNullOrEmpty($operation)) {
+    $operation = "extract"
+}
+
+if ([string]::IsNullOrEmpty($device_type)) {
+    $device_type = "managed,unmanaged"
+}
+
+# Validate operation value
+$validOperations = @("extract", "list_collectors")
+if ($operation -notin $validOperations) {
+    $errorHeader = @"
+
+================================================================================
+                                    ERROR                                       
+================================================================================
+"@
+    Write-Host $errorHeader -ForegroundColor Red
+    
+    $errorMessage = "Invalid operation: '$operation'"
+    Write-Host $errorMessage -ForegroundColor Red
+    Write-Host ""
+    
+    $validOpsMsg = "Valid operations are:"
+    Write-Host $validOpsMsg -ForegroundColor Yellow
+    foreach ($validOp in $validOperations) {
+        Write-Host "  - $validOp" -ForegroundColor Cyan
+    }
+    Write-Host ""
+    
+    # Log the error
+    $logMessage = @"
+
+$errorHeader
+$errorMessage
+
+$validOpsMsg
+$(foreach ($validOp in $validOperations) { "  - $validOp" })
+
+"@
+    $logMessage | Out-File -FilePath $logFile -Append
+    
+    Write-Host "Showing usage instructions..." -ForegroundColor Yellow
+    Write-Host ""
+    Show-Help
+}
+
+# Validate device-type values
+if (-not [string]::IsNullOrEmpty($device_type)) {
+    $deviceTypeArray = $device_type.ToLower() -split ',' | ForEach-Object { $_.Trim() }
+    $validDeviceTypes = @("managed", "unmanaged")
+    
+    foreach ($devType in $deviceTypeArray) {
+        if ($devType -notin $validDeviceTypes) {
+            $errorHeader = @"
+
+================================================================================
+                                    ERROR                                       
+================================================================================
+"@
+            Write-Host $errorHeader -ForegroundColor Red
+            
+            $errorMessage = "Invalid device-type: '$devType'"
+            Write-Host $errorMessage -ForegroundColor Red
+            Write-Host ""
+            
+            $validTypesMsg = "Valid device-type values are:"
+            Write-Host $validTypesMsg -ForegroundColor Yellow
+            foreach ($validType in $validDeviceTypes) {
+                Write-Host "  - $validType" -ForegroundColor Cyan
+            }
+            Write-Host ""
+            
+            Show-Help
+        }
+    }
+}
+
+# Initialize log file with header for this execution
+Write-LogHeader
+
+# Main execution logic based on operation
+switch ($operation) {
+    "list_collectors" {
+        # List all available collectors (suppress return value output)
+        $null = List-Collectors -numbered $true
+    }
+    "extract" {
+        # Extract data and create Excel
+        Extract-Data -collectorIds $collector_ids -deviceType $device_type -fileName $filename
+    }
+    default {
+        Write-Host "ERROR: Invalid operation specified!" -ForegroundColor Red
+        Show-Usage
+    }
+}
+
+$logMessage = "`nLOG FILE: $logFile"
+Write-Host $logMessage
+$logMessage | Out-File -FilePath $logFile -Append
+