http://en.wikipedia.org/wiki/Microsoft_Lync_Server#XMPP optimized Lync Server 2010 OCS Live Communications Server 2003 Lync more information http://en.wikipedia.org/wiki/Microsoft_Lync_Server#XMPP OCS http://en.wikipedia.org/wiki/Microsoft_Lync_Server#XMPP Lync Server http://en.wikipedia.org/wiki/Microsoft_Lync_Server#XMPP OCS Lync http://en.wikipedia.org/wiki/Microsoft_Lync_Server#XMPP Microsoft Lync Server OCS