We have a user who started here a couple of weeks ago that apparently is not appearing under our Address Book in our Outlook 2007. Now, I know he is in the system because when we take our Outlook's out of Cache Mode, he appears. When we turn it back on, he doesn't. We currently have cache mode active to where if our Exchange server ever went down, to our users, it wouldn't show as being offline and they can continue to write and send email as is until it is back up, then it would deliver from the outbox. All my other users show up fine except this one person. Can someone tell me if there is a trick or a solution to getting him to appear in our Outlook Address book. We currently are running Exchange 2007 Standard on a Windows 2003 Server 64bit.