Outlook Identity is too large - help! I am an 'email packrat' I suppose, since I have emails from several years that I keep.  That, combined with me trying to sync my outlook calendar with the my work Exchange calendar, and my identity file is HUGE. For many events in my calendar there are 50-100 instances of the same appointment or birthday.

Is there a way to downsize my identity file, or make my current one something like .old and start fresh with a new one?
Before deciding to split the database / identity, have you tried just rebuilding it?

I believe Outlook never really deletes things, just marks them as deleted until you run maintenance on the database files that outlook uses inside your identity folder.

Fire up the Microsoft Database Utility (search using spotlight or find it in the Office folder), select the identity and press the rebuild button.