Have a handful of users who open groupwise client and can see all their folders on the left but the mailbox window is blank. If the user clicks the calendar then switches back to mailbox it will usually show the emails. Not always. Same with changing the display property from custom view to recieved items and back. Sometimes it fixes it others it doesnt. Regardless, if you close groupwise client and reopen It the screen will be blank again and the steps must be repeated to see any emails. If the user logs in on a different machine it all works normally and all emails can be seen.

Reinstalled client. Tried 2012 sp2 and sp3.

Any ideas?