Frequency - 2 times, 6 weeks ago and yesterday. User didn't change any settings. Not all email is gone from inbox. Most current email and back - to begginning of April is gone. There were 2 email accounts set up: default was Type - "POP3/SMTP" Acct. that pointed to Exchange Server, 2nd was Type - "Exchange" Account. "Use Cached Exchange mode" was on. Current View is marked "Messages", "Customize Current View" Filter is Off, 1 rule - "Clear Categories on Mail". Email not in any other folders including Archive. Email not found in "Recover 'Deleted Items' folder". 6 other workstations using Outlook 2007 getting email from Exchange Server none experiencing same problem.
Things I have done:
Deleted the Type -"POP3/SMTP" account
Unchecked the "Use Cached Exchange Mode" - No change in InBox
Renamed the .OST file, rechecked "Use Cached Exchange Mode" - No change in InBox
In my searching I found 2 other people with exact problem but no resolution.