In the Exchange Administrator utility, when I go to Organization/Configuration/Servers/EmailServer/Server Recipients, I receive an error message reading "The operation failed. Microsoft Exchange Address Book ID no: 80004005-0000-00000000" Checking on the M$ Knowledge Base, they say it relates to moving a mailbox, but we haven't done any moving for a long time (this behavior was just noticed 2 days ago). I can see the list of Recipients by just going to Organization/Recipients, but I think that something must be wrong with our Exchange. We also had a user who couldn't access her email even though network connections were present and she had the correct information for her profile ('name could not be resolved' error) and another user who is included in the office distribution list but receives no messages when someone sends a message to the list. Is this sounding like corruption, and if so, what can be done to recover from it? Thanks