1. I am using Outlook 2010 client that points to a Hosted Exchange server.
2. I see about a 1000 email for a user in OWA. OWA works fine in all respects.
3. I synced the Outlook 2010 on this user's machine, and about the last 170 days of emails did NOT show up in Outlook 2010 on the user's machine!
4. Deleted the Outlook profile on the user's machine and re-did the sync of Outlook 2010.
5. EXACT same problem: last 170 days of email do not appear in Outlook 2010.