We have 2 domain controllers in 2 different physical locations. Our exchange server is at the same location as one of them. When that DC failed (SCSI controller), our entire Exchange stopped working. It appears the information store is inaccessible, even though I verified it IS stored locally on the Exchange server. So nobody can use Outlook (unless in cached mode, but no new e-mails) or OWA. Is there a work around? How can we resolved this so it continues to work. Everything else in the network "fails over" to our other domain controller.