We are in the middle of testing our DR site. We have a point to point t1 line. We have 1 DC at the DR site that was connected so that AD would be up to date. I am currently running an Exchange install with the Disaster Recovery switch. I disconnected the T1 line first. In order to do this I had to seize the FSMO roles on the DC that is currently over here. Now can I put the DC that is at the backup Site back onto the network or do I need to remove the computer account from the main site and then reinstall windows on the Backup DC?