Unable to assign RBAC role to the root management group

Hi,

If you try to assign an RBAC role to the root management group, you may encounter the following error, even if you are the Azure Account Owner, the Global Administrator…

New-AzureRmRoleAssignment -SignInName user@domain.io -RoleDefinitionName "Reader" -Scope /providers/Microsoft.Management/managementGroups/root

New-AzureRmRoleAssignment : The client ‘xxxx@domain.io’ with object id ’46f38ab7-404e-4a36-906f-3a19299cf41c’ does not have authorization to perform action ‘Microsoft.Authorization/roleAssignments/write’ over scope ‘/providers/Microsoft.Management/managementGroups/root/providers/Microsoft.Authorization/roleAssignments/e3a41417-f5b5-4476-8171-14866f42481f’.
At line:1 char:1

New-AzureRmRoleAssignment -SignInName
user@domain.io -RoleDef …

~~~~~~~~~~~~~~~~~

CategoryInfo : CloseError: (:) [New-AzRoleAssignment], CloudException

FullyQualifiedErrorId : Microsoft.Azure.Commands.Resources.NewAzureRoleAssignmentCommand

Solution

You need to Elevate access for the Global Admin in order to control the root management group.

Do this: https://docs.microsoft.com/en-us/azure/role-based-access-control/elevate-access-global-admin

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