Our Exchange 2010 Server has about 100 users.
One user claims some of his email messages are disappearing, seemingly at random.
This has happened enough times to rule out user-error. (In other words, he is not deleting the messages and forgetting he is deleting them).
A message comes to his Inbox. A day or so later (again, no apparent pattern), the message disappears. It is not in any other folder in his mailbox. It is not in the Deleted Items folder. A 'search all folders' search comes up empty.
As the admin, I KNOW the message came to this individual because:
(a) it passes through my Mail Security server (a separate machine altogether) and shows up in that audit log
(b) the user saw the message in his Inbox (and in some cases, even replied to those messages), and
(c) I use a third-party product (GFI) to archive all incoming email. (In fact this is how he is able to retrieve his 'missing' message - by finding it in the mail archive when it is missing from his Inbox).
Any ideas what is causing this?
This seems to happen at random. Not specific messages from specific senders. Not at specific times.
My guess is this only happens with 1 out of every 50 (?) emails - not frequent enough to quickly troubleshoot, but still annoying to the user.
I was thinking I could/should try recreating this user's mailbox.
How do I do this in Exchange 2010?
Or is there a utility to scan this user's mailbox?
(I should mention this user's mailbox is over 9 GB, which I am sure doesn't help)