I am currently upgrading our exchange 5.5 site to Exchange 2003. After installing the active directory connector and running the connection agreement wizard I notice two things. When I examine the properties of users in "active directory users and groups" on my prospective exchange 2003 server the users have all the new exchange attributes. However if I examine the properties of users in "active directory users and groups" on a different domain controller the properties do not have the extra exchange tabs. Its looks like the schema has not been extended for these other domain controllers. However if I go into "active directory sites and services" and force replication I get no errors. So I am worried that in some sense my schema has not been replicated. Also when I hit verify after running the connection agreement wizard it tells me I have users still to replicate to the exchange 5.5 directory. Do I have to worry about this as all the users in my cn=users don't need mail boxes and I think these are the users that haven't been written to the exchange 5.5 directory.