Azure Backup with Enhanced Policy can't be enabled for an Azure VM with Trusted launch

Question

Trying to enable Backup for an Azure VM with Trusted Launch:

• selected Policy sub type: Enhanced
• selected VM and Enabled Backup

{"code":"DeploymentFailed","target":"/subscriptions/IDOFSUBSCRIPTION/resourceGroups/RSGNAME/providers/Microsoft.Resources/deployments/ConfigureProtection-1711379783085","message":"At least one resource deployment operation failed. Please list deployment operations for details. Please see https://aka.ms/arm-deployment-operations for usage details.","details":[{"code":"ResourceDeploymentFailure","target":"/subscriptions/IDOFSUBSCRIPTION/resourceGroups/RSGNAME/providers/Microsoft.RecoveryServices/vaults/Backup-01/backupFabrics/Azure/protectionContainers/IaasVMContainer;iaasvmcontainerv2;appproxy_01;proxy-01/protectedItems/vm;iaasvmcontainerv2;appproxy_01;stam-proxy-01","message":"The resource write operation failed to complete successfully, because it reached terminal provisioning state 'Failed'."}]}

If I try to deploy it as ARM template:

Microsoft Azure Backup encountered an internal error. (Code: CloudInternalError)

Answer 1

"Sharing the solution with broader community"

Issue description: Enabling Backup for an Azure VM with Trusted Launch failed:

"message":"The resource write operation failed to complete successfully, because it reached terminal provisioning state 'Failed'."

Error: Microsoft Azure Backup encountered an internal error. (Code: CloudInternalError)

Solution: Instant Recovery Days and Daily Retention were both set to 7 days. After setting Instant Recovery Days to 5 it worked.

Deploying this Backup Policy via terraform will set (Instant Recovery Days and Daily Retention) per default to 7 days.

https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/backup_policy_vm#instant_restore_resource_group

Hope this helps others on this community who may be looking for a solution to this problem.

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