This multiple address group in outlook 11 has always worked before, now I get above message. Outlook is screwed up.  Please help!  IMAP

Thanks to ArshadKhan88 below for his/her response.  My situation is different. I did not migrate over. My groups mailing list worked fine for months, then yesterday, 12/30, it just stopped and I'm getting above message. I have been running for several weeks Maverick OS X 10.9.1 (13B42), and IT FOULED UP 9:00 AM 12/30/13.  I updated to Office 14.3.9 at 8:00 PM thinking perhaps it would fix, it did not. Gotta tell ya, stuff like this honks me off.