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