Merge pull request #224295 from isamorris/patch-29

Update kerberos-authentication-portal.md

Author: prmerger-automator[bot]

articles/bastion/kerberos-authentication-portal.md

@@ -14,9 +14,11 @@ ms.author: cherylmc
 
 This article shows you how to configure Azure Bastion to use Kerberos authentication. Kerberos authentication can be used with both the Basic and the Standard Bastion SKUs. For more information about Kerberos authentication, see the [Kerberos authentication overview](/windows-server/security/kerberos/kerberos-authentication-overview). For more information about Azure Bastion, see [What is Azure Bastion?](bastion-overview.md)
 
-> [!NOTE]
-> During Preview, the Kerberos setting for Azure Bastion can be configured in the Azure portal only.
->
+## Considerations
+
+* During Preview, the Kerberos setting for Azure Bastion can be configured in the Azure portal only.
+* VMs migrated from on-premises to Azure are not currently supported for Kerberos. 
+* Cross-realm authentication is not currently supported for Kerberos. 
 
 ## Prerequisites