How do I enable user accounts using UPN?

Question

Hi Group, 
 I have added an Active Directory servers to the sophos utm config. I was able to get it working ok but I can not use UPN login names? How do I change this setting? 
 For example, I have an active directory user account called test@domain.com . I cannot login to the UTM user portal with this, but I can login with just 'test'. We would require the full user name. 
 
 Thanks.

emmosophos · Answer

Hello Tom, 
 Thank you for contacting the Sophos Community. 
 You would need to do the following: 
 
 Clone the desired server to start a new server 
 Change Backend to LDAP 
 Change User Attribute to > 
 Enter userPrincipalname into Custom field. 
 
 Regards,