We have an issue with a Windows 2008 R2 box which has Exchange 2010 SP1. BES is also connected to the Exchange server. Microsoft has made a recommendation that we need to disconnect the Exchange server from the domain and reconnect it afterwards. We are using vSphere/ESX 4, so I can create snapshots of our DC's, Exchange and BES server beforehand and revert back if needed. Do you see any problems with disconnecting from the domain and rejoining? Thank you.