On the 2 new servers, install Windows 2003 from the beginning. When you promote them to domain controllers of an existing forest and domain, they will go in as Windows 2000 domain level. (Make sure your existing domain controllers are in 2000 native mode and completely up to date.) Once you transfer all services and roles, you would then demote the old servers one at a time and leave say 3-5 days if you have the time available and then remove them from the domain and then shut them down. At that point, you could then raise the active directory level from windows 2000 to Windows 2003 native. John T eServices For You "Seek, and ye shall find!" -----Original Message----- From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Svein Arild Haugum Sent: Tuesday, April 04, 2006 11:58 PM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] OT: Active Directory This is not Exchange related, but I see there is a lot of Active Directory skills here, so i give it shot. I have a single domain, 2 domain controllers, all windows 2000. The hardware for the domain controllers are quite old, and are now running out of disk space. I need to get to: 2 domain controllers on new hardware, and upgrade til Windows 2003 as an option, not required. What im planning is this: Buy 2 new Windows 2000 servers, install/move services like DHCP, DNS, WINS, Active Directory, FSMO, GC etc. And demote the old servers. And then upgrade to Windows 2003 afterwards to not complicate the moving process. I probably could install 2003 servers right away, and save me the upgrade, but is it recommended to start moving FSMO across different operation system levels? Mvh Svein Arild