ok I have a 2000 active directory already present, and was goingt to leave that as teh domain controller I cant have 2003 server in on the 200 domain and then iI would lik eto nstall 2003 exchange on teh 2003 server. I have alreday joined teh 2003 server to teh 2000 domain. what do I need to do from ere without impacting the users. If I have to make the 2003 the domain controller that is fine, but I want to make sure the users do not see anything different as they are logging intop the 2000 domain right now? what shoudl I do?