InvalidTemplateDeployment 🔷 Azure

ARM/Bicep: DeploymentFailed / InvalidTemplateDeployment / InvalidTemplate

An Azure Resource Manager (ARM/Bicep/Terraform) deployment failed; the inner error under “details” has the real cause.

Seen on: Azure

Meaning

DeploymentFailed is a wrapper. The details array contains the actual code — InvalidTemplate (syntax/expressions), InvalidTemplateDeployment (validation such as SKU/quota/policy), or resource-specific errors.

Common causes

  • Template expression or reference error
  • Parameter value invalid for the resource
  • Policy, quota or SKU restriction during validation
  • Dependency missing or ordering issue

⚡ Quick fix

  1. Read the innermost error in details
  2. Validate before deploying: az deployment group validate / what-if
  3. Fix the specific resource property

Detailed fix by platform

Azure CLI

  1. bash
    az deployment group what-if -g rg-app -f main.bicep -p @params.json
az deployment operation group list -g rg-app -n main --query "[?properties.provisioningState=='Failed'].properties.statusMessage"

How to diagnose

  1. Inner error — details[].code/message
  2. Resource — Which resource failed?
  3. Validation — what-if output

🔧 Still not fixed?

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