On 9/20/10 I received a prompt to compact my Outlook folders. I clicked 'OK', allowed the process to finish, and then turned off my computer for the night. On 9/21, I noticed that all emails in my Inbox from 7/19/10 through 9/20/10 were gone. There was no impact to emails prior to 7/19/10, nor was there any impact to my Send folder. How do I retrieve the missing emails?