I have an exchange account set up in Outlook 2011 on a Macintosh running Mavericks. I archived some past mail messages in folders stored in the "on my computer" folder to get them off the exchange server. I had to restore my mail file from  a Time Machine back up and the "on my computer" folders are gone.  (yes, I have them as visible in the preferences)  My question is, where do those physical folders reside? They are clearly not in the mail database for my identity as they would have been restored with everything else.  Stumped?!?!?