I have interited a domain in trouble. Logins from clients are taking 5 or so minutes to login, I suspect because the clients are attempting to process group policy from domain.co, that is what is say in the event logs. DCDIAG and NetDiag are showing domain.co as well as domain.com, which is the correct domain. I don’t see any entries to domain.co but it is in netlogon.dns and in windowsschanel and a sch entry in the registry. Have trouble resolvoing with the pdc which is also running DNS Server. I would be happy to provide additional information anybody might consider important.