First, no such thing as PDC and BDC any more. They are all DCs with various roles. No, you can not just run DCPROMO as if that server was a DC before Exchange was installed, Exchange is only going to look to it for AD information. There is information out there on how to "point" Exchange to a different DC. After that, I think you can run a DCPROMO. John T eServices For You "Seek, and ye shall find!" -----Original Message----- From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Ara Avvali Sent: Wednesday, April 12, 2006 3:38 PM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] remove dc role from exchange Hello everyone, Just to be cleared! There are 3 server and all 3 are domain controllers. PDC,MAIL,BDC. PDc is holding the FSMO rule. If I want to demote exchange box a domain master, all I need to do is running dcpromo ,right? Exchange 2003 running on server 2003. Appreciated :-)