SOLVED! Customers running Office Communicator 2007 + Office 2007: This issue is fixed by applying the hotfix referenced in KB 961752 ( http://support.microsoft.com/kb/961752 ), and although the KB article does not specifcally call out this...

Notification In an effort to provide enhanced capacity and service reliance, Windows Live Messenger will soon be adding additional IP addresses used for PIC/Federation traffic. Some organizations have chosen to restrict this type of traffic to specific...