Merge pull request #205385 from bandersmsft/ghissue95829

MCM - Minor update for ghissue 95829

Author: PRMerger7

articles/cost-management-billing/manage/assign-roles-azure-service-principals.md

@@ -7,7 +7,7 @@ tags: billing
 ms.service: cost-management-billing
 ms.subservice: billing
 ms.topic: how-to
-ms.date: 06/16/2022
+ms.date: 07/20/2022
 ms.author: banders
 ---
 
@@ -71,6 +71,8 @@ Later in this article, you'll give permission to the Azure AD app to act by usin
 - A SubscriptionCreator role can be assigned to an SPN only by a user who is the owner of the enrollment account (EA administrator). The role isn't shown in the EA portal. It's created by programmatic means and is only for programmatic use.
 - The EA purchaser role isn't shown in the EA portal. It's created by programmatic means and is only for programmatic use.
 
+An SPN can have only one role.
+
 ## Assign enrollment account role permission to the SPN
 
 1. Read the [Role Assignments - Put](/rest/api/billing/2019-10-01-preview/role-assignments/put) REST API article. While you read the article, select **Try it** to get started by using the SPN.