Over the last 36 hours I have had 5 Event Details show up
that say NT user <some name> logged on to <another user>
mailbox, and is not the primary Windows NT account on this
mailbox. I have checked both users in Exchange to make
sure the are listed as their own Primary NT account. They
are. And it is always the same two users involved.
What is the most likely scenario going on here? Do you
think this is a security breach or a fluke?