JID format for the AD integrated Jabber

Hi Team,

I have ejabberd Server running with version 2.1.9.Also integrate into AD Server.
Right now i am using Chat JID as Mail attribute in AD server.

{ldap_uids, [{"mail", "%u@domain.com"}]}.

Could you please tell me how to use givenName and SN attribute in AD Server as like below

givenName.SN@domain.com

Please help to come out this issue.

Regards
Moorthy