Outlook 2011: where are mail message in my archive file stored? I use Outlook to access Exchange.  I store old mail in an Outlook Archive folder. I know that Outlook 2011 stores data in /Users/&lt;user&gt;/Documents/Microsoft User Data but where exactly are these Archive emails stored on my computer?

The reason I'm asking is because I want to provide the path to my archive files to my cloud backup program and exclude all the other Outlook files that are available/stored on the Exchange server.
Outlook 2011 for MAC stores only the indices in a database file and stores the data records (individual emails) as a series of files nested within folders. The Database file and its folders are located here:

~/Documents/Microsoft User Data/Office 2011 Identities/Main Identity/Database
~/Documents/Microsoft User Data/Office 2011 Identities/Main Identity/Data Records

Adding these path's to your backup strategy should address your issue.