Upgrading a friends' 2011 MacBook Pro 15″ from Snow Leopard to Mavericks broke the Outlook identity.

There seems to be a problem with rebuilding the Main identity using the Microsoft Database Utility. I already tried to manually copy the essential folders of the (old) main identity to a new identity using finder and rebuilt it, so far without success. Every try ends in error [-18000]

The main identity has a size of approximately 10GB

Anybody experienced the same problem?