Through the ESM I am trying add an additional server to use as the GC and DC for DSAccess. It looks like the current server was manually added (its not on auto detect). When I select to add a GC I get error 80004005. I dont even get to a list. When I go to add a DC I can only add one that is in the same site. Any ideas? All the DC's in our domain are also GC's. Using Exchange 2003 SP1. The only DC's in the same site as this exchange server are holding FSMO roles. If I run a netdiag or dcdiag all servers are reachable as well as the required ports.

Set it to automatically detect. Unless your Exchange Server is installed on a DC, it should be able to find those other DCs. If it doesnt, errors should be recorded in the event logs.