We have one user that, when they email a specific group from either their Blackberry or their internal email, it gives them a failure notice for a former employee since their account no longer exists. We've dug around on his PC and also on the Exchange server and AD, but can't find a thing on it. No other user gets this when emailing that same group. I'd say it's the guy's PC, but he got a Blackberry a few weeks ago and it does it, too. Thanks ahead of time for any ideas/help!