Byron, I belive you still need to upgrade your DC (2000) to 2003 first then You can promote your New boxes to DC and transfer the Roles From the Old DCs to the New ones. After you complete this you Can decommission the old boxes. Luke Beamer I. S. Manager San Diego Pleasant Holidays 4025 Camino Del Rio South Suite 200 San Diego, CA. 92108 PH: 619-521-2710 FAX: 619-521-2760 Cell: 619-454-7302 From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Byron (Yahoo) Sent: Friday, September 29, 2006 11:38 AM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Exchange 2003 server in windows 200 domain Background: Exchange 2003 (member server) in windows 2000 domain. 2 windows 200 DCs. Running for about 1 year with exchange 2003. now we want to upgrade the domain to windows 2003 and add a new windows 2003 DC (but not upgrade the older windows 200o DC OSs to windows 2003 - we want to retire them). We've run the follwing on the 2000 DC housing the Schema master and infrastructure. both completed successfully - adprep /forestprep - adprep /domainprep - allowed Replication (it's been two days) Still getting this error when running dcpromo on our new windows 2003 server , when tryign to add it as a DC to the oriignal 2000 AD. Any thoughts on why we're still gettign this? Error: "The operation failed because: The active directory installation wizard cannot continue because the frst is not prepared for installing windows 2003 ..... "The version of active directory schema of the source forest is not compatible with the version of AD on this computer" thanks for any pointers. byron