Update b2b-quickstart-add-guest-users-portal.md

Added "ms.custom: engagement-fy23” metadata to the article.

Author: csmulligan

articles/active-directory/external-identities/b2b-quickstart-add-guest-users-portal.md

@@ -9,7 +9,7 @@ ms.date: 05/10/2022
 ms.topic: quickstart
 ms.service: active-directory
 ms.subservice: B2B
-ms.custom: it-pro, seo-update-azuread-jan, mode-ui
+ms.custom: engagement-fy23, it-pro, seo-update-azuread-jan, mode-ui
 ms.collection: M365-identity-device-management
 #Customer intent: As a tenant admin, I want to walk through the B2B invitation workflow so that I can understand how to add a guest user in the portal, and understand the end user experience.
 ---