Not supported. And you'll break several pieces of Exchange if you do so. http://blogs.brnets.com/michael/archive/2005/01/24/319.aspx From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Pete Hartman Sent: Tuesday, January 16, 2007 10:00 PM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Demoting an Exch 2k3 running as a DC I've been lurking here a while, and thought I would ask if anyone has, in a two server setup, successfully demoted one server running Exch 2k3 on W2k3 from a DC when running in conjunction with another server on the same domain running W2k3 as DC, and the drawbacks/advantages to doing this. Thanks! Pete -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.16.12/631 - Release Date: 1/16/2007 8:25 AM