I am currently running a Windows Active Directory in 2000 Mixed Mode. I have 4 Windows 2000 Servers and 5 Windows 2003 Servers. One of the 2003 Servers is running Exchange 2003 (Ent.).Both of my DC's are Windows 2000 machines. These two servers are getting rather "tired", and I'd like to move the DC roles to newer machines, either onto existing 2003 server hardware, or purchase two small Dell PowerEdge 850 servers and make them the DCs (and nothing else). Any problems switching from 2000 mixed to 2003 native? Any tips or advice on the proper steps to take? Thanks.