Add Announcement to Disable Tenanted Passthrough (#3437)

docs-conceptual/azps-13.0.0/disable-tenanted-passthrough.md

@@ -0,0 +1,52 @@
+---
+description: Learn about Azure PowerShell disabling tenanted passthrough to enhance security. Check tenant membership, invite guest users, and resolve login issues.
+ms.custom: devx-track-azurepowershell
+ms.devlang: powershell
+ms.service: azure-powershell
+ms.topic: conceptual
+title: Tenanted passthrough is going to be disabled for Azure PowerShell
+---
+
+# Tenanted passthrough is going to be disabled for Azure PowerShell
+
+To enhance security, Azure PowerShell is going to block users from other organizations or personal
+Microsoft accounts (consumers) from signing in with Azure PowerShell to tenants where they aren't
+invited as guests.
+
+> [!NOTE]
+> This change affects all Azure PowerShell versions.
+
+If you attempt to sign in to a tenant where you aren't invited as a guest, you see the following
+error message in your web browser:
+
+```Output
+Selected user account does not exist in tenant '$YourTenantName' and cannot access the application '00000000-0000-0000-0000-000000000000(Microsoft Azure PowerShell)' in that tenant. The account needs to be added as an external user in the tenant first. Please use a different account.
+```
+
+To sign in to a tenant, ensure the user is either:
+
+- A member of the tenant
+- A guest invited to the tenant
+
+## Check whether you are the member of a tenant
+
+If your username is `someone@example.com` and the tenant ID is `$tenantId`, run the following
+commands:
+
+```azurepowershell
+Connect-AzAccount -AccountId someone@example.com
+Get-AzTenant
+```
+
+When you retrieve the list of tenants, determine if `$tenantId` is included. If not, or if the list
+is empty, contact the tenant administrator to request an invitation.
+
+## Invite a guest member
+
+As a tenant member, you can [invite a guest user to your tenant][invite-tenant-guest]. The guest
+user receives an email invitation to join the tenant. Once the invitation is accepted, they're added
+as a guest user and gain access to the tenant's resources.
+
+<!-- link references -->
+
+[invite-tenant-guest]: /entra/external-id/b2b-quickstart-add-guest-users-portal

docs-conceptual/azps-13.0.0/toc.yml

@@ -17,6 +17,8 @@
       href: release-notes-azureps.md
     - name: Upcoming breaking changes
       href: upcoming-breaking-changes.md
+    - name: Tenanted passthrough disabled
+      href: disable-tenanted-passthrough.md
 - name: Install
   items:
     - name: Overview