Merge pull request #98383 from f-bader/patch-8

Use User Principal Name to sign-in

Author: ShannonLeavitt

articles/bastion/kerberos-authentication-portal.md

@@ -57,6 +57,9 @@ In this section, the following steps help you modify your virtual network and ex
 
 ## To verify Bastion is using Kerberos
 
+> [!NOTE] 
+> You must use the User Principal Name (UPN) to sign in using Kerberos.
+
 Once you have enabled Kerberos on your Bastion resource, you can verify that it's actually using Kerberos for authentication to the target domain-joined VM.
 
 1. Sign into the target VM (either via Bastion or not). Search for "Edit Group Policy" from the taskbar and open the **Local Group Policy Editor**.