forgot to cc the list... Hi > Perhaps you can use a domain-trust between a.domain.com and b.domain.com? > There is a trust between the two domains, but the OU structure is different. a.domain.com has OU=Sections OU=Department OU=Office Location OU=Organisation Name and the users in the different sections. b.domain.com has OU=Users OU=Groups If I were to query the AD that is master for a.domain.com, I will not get any results about anyone in b.domain.com since the structure is different. At the moment, a.domain.com trusts b.domain.com. Unless I am missing something here, if the OU structure differs, even if there is a trust, getting a user on b.domain.com will need a query different from a.domain.com. -- Mike Of course, you might discount this possibility, but remember that one in a million chances happen 99% of the time. ------------------------------------------------------------