In response to a comment / question on an earlier blog, I have taken a quick look at applying Azure Policy to Azure Management Groups. Azure Management Groups are a relatively new concept that was introduce to ease the management of authorizations on multiple subscriptions, by providing a means to group them. For such a group, RBAC roles and assignments can be created, to manage authorizations for a group of subscriptions at once. This saves a lot of time when managing multiple subscriptions, but also reduces the risk of mistakes or oversight of a single assignment. A real win.
Now, Azure Policies can also be defined in and assigned to management groups it is claimed here. However, how to do that is not documented yet (to my knowledge and limited Goo– Bing skills), nor was it visible in the portal. So after creating a management group in the portal (which I had not done before), I I turned to Powershell and wrote the following to try and do a Policy assignment to a Management Group:
$policyDefinition = Get-AzureRmPolicyDefinition -Name ca7660f6-1ba5-4c57-b26c-f816d2a192f6
$mg = Get-AzureRmManagementGroup -GroupName test
New-AzureRmPolicyAssignment -Name test -DisplayName test -PolicyDefinition $policyDefinition -Scope $mg.Id
Which gave me the following error:
New-AzureRmPolicyAssignment : InvalidCreatePolicyAssignmentRequest : The policy definition specified in policy assignment 'test' is out of scope. Policy definitions should be specified only at or
above the policy assignment scope.
At line:1 char:1
+ New-AzureRmPolicyAssignment -Name test -DisplayName test -PolicyDefin ...
+ CategoryInfo : CloseError: (:) [New-AzureRmPolicyAssignment], ErrorResponseMessageException
+ FullyQualifiedErrorId : InvalidCreatePolicyAssignmentRequest,Microsoft.Azure.Commands.ResourceManager.Cmdlets.Implementation.NewAzurePolicyAssignmentCmdlet
Which makes sense: you can only assign a policy to (a resourcegroup in) a subscription, if that is also the subscription the policy definition is saved into. So on to find out, how to define a policy within a resource group. To do that, I first wanted to retrieve an existing policy from the portal, so I navigated to Azure Policy page in the portal and stumbled onto the following screen:
And from here on, I could just assign a policy to a management group, if I had one in that group already… After switching to defining a policy, I noticed that I now could also save a policy definition to a management group.
So the conclusion is: yes, you can assign Azure Policies to Management Groups just like you can to a resource group or subscription, iff you already have at least one management group!