Any and all tips are welcome - we would like to upgrade our one domain controller to Windows Server 2003. We currently have the DC @ Windows 2000 - no 2nd DC yet. We would like to upgrade it to Windows 2003 and add a 2nd DC. We have an Exchange 2003 Server (on Server 2003), one File/Print server running Windows 2000, everything else is 2003. Do we need to run the domainprep utility? Should we upgrade the current DC before adding the 2nd DC?