I have a Dell PowerEdge server that has a corrupted install of windows SBS 2011 standard. At this point I've spent so much time on it, I would just like to do a fresh install wiping it clean. There are 18 users on this domain that are currently using exchange which of course is bundled with SPS 2011. Without having another box to act as a migration server, what is the best way for me to back up just exchange mailboxes and user credentials, and then wipe current box clean, reinstall SPS 2011, then import user credentials and restore mailboxes? I need to try to resolve this hopefully within 72 hours, as that is the timeframe that I have available to be able to do this. Thanks experts!