I'm working on upgrading my domain controllers from 2003 to 2008R2. So far everything is working great with the exception of my BES server. I have one machine left to replace (DC1) which used to hold all of the FSMO roles which I've since transferred to a new DC. This morning I shut down DC1 to make sure everything still worked and found that everything aside from our blackberries worked fine. Attempting to send email via the blackberry resulted in a failure (status says message included an invalid address). Once DC1 was turned back on email on the blackberry started working immediately. I assume somewhere in the bes express server configuration its pointing to DC1 but after looking at every config screen I can't find it. Could anyone offer insight into what part of the BES configuration I should modify? Thanks in advance!