Hi we have to migrate our Active Directory from AD 2003 to AD 2008. All domain users will change to a new domain, so every users's SID will change. with ADMT we will change these SID in order to delete old SID and keep the new one. i would like to know if this EMC Celerra support this change. Actually, ADMT will scan every cifs share and put the right SID on each object in ACL (users ans group) if you know, any impact on user mapper ?