Mail.app on Lion with Exchange doesn't get updates I've noticed since upgrading to Lion that Mail.app doesn't seem to update the mailbox and synchronize properly with Exchange.

Before on SL, or using Outlook now, they always maintained correct state, matching with my iPhone, or webmail. Now, it seems that Lion gets lost. I have to force a sync, open and shut it, or change folders to get it to resync that folder contents.

Is this just me, or is this a known issue?

Is there a work around?

Thanks.
Try the rebuild utility through the app, I had a very similar problem and this resolved it for me. Best of luck.