When using the PowerShell command New-AzSubscriptionAlias it might fail with errors not saying what the real issue is
Errors like: “InvalidManagementGroupId” and “Subscription creation failed since provided management group id is not valid” could suggest that the ID is wrong.
But the reason can actually be that the account that PowerShell is running in context of, is missing the right: “Management Group Contributor” on the management group.
