http://blogs.technet.com/b/office_resource_kit/archive/2011/07/14/temporary-removal-of-lync-connectivity-with-windows-live-messenger-in-office-365-for-professionals-and-small-businesses.aspxAs of this week, Lync connectivity with Windows Live Messenger in Office 365 for professionals and small businesses (Plan P) is temporarily removed. During this temporary period, customers who use Lync with Office 365 for professionals and small businessesen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)