Noted supported subscriptions for MGs

Author: flanakin

articles/cost-management-billing/costs/understand-work-scopes.md

@@ -66,6 +66,8 @@ Cost Management Contributor is the recommended least-privilege role. It allows p
 - **Schedule cost data export** – Cost Management Contributors also need access to manage storage accounts to schedule an export to copy data into a storage account. Consider granting [Storage Account Contributor](../../role-based-access-control/built-in-roles.md#storage-account-contributor) to a resource group that contains the storage account where cost data is exported.
 - **Viewing cost-saving recommendations** – Cost Management Readers and Cost Management Contributors have access to *view* cost recommendations by default. However, access to act on the cost recommendations requires access to individual resources. Consider granting a [service-specific role](../../role-based-access-control/built-in-roles.md#all) if you want to act on a cost-based recommendation.
 
+Management groups are only supported if they contain Enterprise Agreement (EA), Pay-as-you-go (PAYG), or Microsoft internal subscriptions. Management groups with any other subscription types, like Microsoft Customer Agreement or Azure Active Directory subscriptions, cannot view costs. If you have a mix of subscriptions, move the unsupported subscriptions to a separate arm of the management group hierarchy to enable Cost Management for the supported subscriptions. As an example, create two management groups under the root management group: **Azure AD** and **My Org**. Move your Azure AD subscription to the **Azure AD** management group and then view and manage costs using the **My Org** management group.
+
 ## Enterprise Agreement scopes
 
 Enterprise Agreement (EA) billing accounts, also called enrollments, have the following scopes: