We currently have a Windows 2000 domain with our main domain controller and also a second server configured as a domain controller. We'd like to add a Windows 2003 server and make that our domain controller to eventually replace our current main domain controller then eventually setup another 2003 server as a second domain controller. Is it possible to have both a 2000 and 2003 server both be domain controllers and what are the best steps to do this? Thanks, Joe