How to set Outlook 2011 as the main contact manager?
Applications like FaceTime access information stored by Address Book using Apple's Core Data framework. Microsoft has it's own way of storing contact information, and FaceTime won't read it. In order for FaceTime (and other apps) to access your contacts, you need to get the data into Apple's storage container.

Until Microsoft puts Outlook on speaking terms with iCloud, you may use SyncServices to Sync Outlook contacts with the Apple Address Book. From within Outlook:


  On the Tools tab, click Sync Services.
  
  In the left pane, select the check box for Contacts.
  
  Under Select the accounts to sync, choose the account or accounts that
  you want to sync for the selected item type.
  
  Note  The On My Computer account includes all Outlook items that are
  not synchronized with a Microsoft Exchange account.
  
  On the Outlook folder to add new items to pop-up menu, choose the
  location in Outlook where you want new items to be saved. "New" items
  are those that are added first in a different application or device,
  and then synced to Outlook.
  
  Close the Sync Services dialog box, and then on the confirmation
  message, click OK.




Be certain Outlook is fully up-to-date because there were reports of problems with syncing using earlier versions under OS 10.7 Lion.