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Regression: what-if fails when accessing ARM‑injected read‑only properties (id) on multiple resource types — works in validate & create

Needs: Triage 🔍

Status: Open.

#435 In Azure/arm-template-whatif;

· mendo96 opened on Apr 21, 2026

az deployment sub what-if never completes when nested Microsoft.Resources/deployments contains a Cosmos DB container copy loop

Status: Open.

#434 In Azure/arm-template-whatif;

· jeevanions opened on Apr 17, 2026

What-if returns false AuthorizationFailed for EventGrid and deploymentScripts even with --validation-level ProviderNoRbac

Status: Open.

#432 In Azure/arm-template-whatif;

· georgekosmidis opened on Apr 14, 2026

WhatIf ignores conditional deployment check

Needs: Triage 🔍

Status: Open.

#433 In Azure/arm-template-whatif;

· jocoyo opened on Apr 9, 2026

Using resourceGroup().tags for tags property results in a InvalidTemplateDeployment error

Status: Open.

#431 In Azure/arm-template-whatif;

· WillemRB opened on Apr 8, 2026

Bicep what-if changes are not accurate for Microsoft.SignalR/signalR resources on multiple API versions

Needs: Triage 🔍

Status: Open.

#430 In Azure/arm-template-whatif;

· gchappel opened on Feb 25, 2026

What-If Noise: DOTNET_ReadOnlyDataProtectionKeyDirectory shows as removed when autoConfigureDataProtection is enabled

Status: Open.

#429 In Azure/arm-template-whatif;

· carlin-q-scott opened on Jan 28, 2026

az deployment group validate and what-if do not detect deployment failures caused by redundant/duplicate app settings in App Service

provider bugIssue exists in the resource providerIssue exists in the resource provider

Web/sites

Status: Open.

#428 In Azure/arm-template-whatif;

· Arthusmeng opened on Dec 15, 2025

Bicep what-if noise in Microsoft.Fabric/capacities

Status: Open.

#427 In Azure/arm-template-whatif;

· camielkns opened on Dec 12, 2025

Manipulating output breaks What-if

bugSomething isn't workingSomething isn't working

fix committedThe fix for the issue has been checked into an internal repo and is awaiting deploymentThe fix for the issue has been checked into an internal repo and is awaiting deployment

Status: Open.

#426 In Azure/arm-template-whatif;

· jachin84 opened on Dec 8, 2025

Microsoft.App/containerApps multiple probes change order randomly

Status: Open.

#425 In Azure/arm-template-whatif;

· carlin-q-scott opened on Nov 12, 2025

Multiple Event Grid system topics on the same source not allowed but not caught by WhatIf

EventGrid/systemTopics

provider bugIssue exists in the resource providerIssue exists in the resource provider

Status: Open.

#424 In Azure/arm-template-whatif;

· felixtsem5 opened on Nov 12, 2025