Merge pull request #294477 from bandersmsft/understand-ea-roles-purchaser

MCM - Update understand-ea-roles for ea purchaser GUID

Author: prmerger-automator[bot]

articles/cost-management-billing/manage/understand-ea-roles.md

@@ -69,7 +69,7 @@ Use Cost Management in the [Azure portal](https://portal.azure.com) so you can m
 
 Direct EA customers can complete all administrative tasks in the Azure portal. You can use the [Azure portal](https://portal.azure.com) to manage billing, costs, and Azure services.
 
-EA Billing roles can only be assigned to individual user accounts. Assigning these roles to Distribution Groups (DGs) and Security Groups (SGs) is not supported. To validate user authenticity, each user must have a valid work, school, or Microsoft account. Ensure that each account is associated with an email address to actively monitor it. Enrollment notifications are sent to the email address.
+EA Billing roles can only be assigned to individual user accounts. Assigning these roles to Distribution Groups (DGs) and Security Groups (SGs) isn't supported. To validate user authenticity, each user must have a valid work, school, or Microsoft account. Ensure that each account is associated with an email address to actively monitor it. Enrollment notifications are sent to the email address.
 
 > [!NOTE]
 > The Account Owner role is often assigned to a service account that doesn't have an actively monitored email.
@@ -108,6 +108,8 @@ Users with this role have permissions to purchase Azure services, but aren't all
 
 The EA purchaser role is currently enabled only for SPN-based access. To learn how to assign the role to a service principal name, see [Assign roles to Azure Enterprise Agreement service principal names](assign-roles-azure-service-principals.md).
 
+If you have EA Admin or Reader permission, you can call the [Billing Role Assignments - List By Billing Account API](/rest/api/billing/billing-role-assignments/list-by-billing-account) to see EA Purchaser role assignments on the enrollment. The API response lists all role assignments on the enrollment. To add a filter for the EA Purchaser role, filter with roleDefinitionId `da6647fb-7651-49ee-be91-c43c4877f0c4`. The value is unique to the EA Purchaser role.
+
 ### Department administrator
 
 Users with this role can:
@@ -193,7 +195,7 @@ When new Account Owners (AO) are added to an Azure EA enrollment for the first t
 Once they activate their account, the account status is updated from **Pending** to **Active**. The account owner needs to read the content and select **Yes, I wish to continue**. New users might get prompted to enter their first and family name to create a Commerce Account. If so, they must add the required information to continue and then the account is activated.
 
 > [!NOTE]
-> A subscription is associated with one and only one account. The warning message includes details that warn the Account Owner that accepting the offer will move the subscriptions associated with the Account to the new Enrollment.
+> A subscription is associated with one and only one account. The warning message includes details that warn the Account Owner that accepting the offer moves the subscriptions associated with the Account to the new Enrollment.
 
 ## Add a department Admin