Lync Server 2010 Jan 2011 CU was released . Below is the detail information.

server

2467771 Description of the update package for Lync Server 2010, Administrative Tools: January 2011

2467775 Description of the cumulative update for Lync Server 2010, Core Components: January 2011

2467776  Description of the update package for Lync Server 2010, Conferencing Server: January 2011

2449497 Description of the update package for Lync Server 2010, Web Components Server: January 2011

2467765 Description of the update for Lync 2010 Group Chat Client: January 2011

2467764 Description of the update for the Lync Server 2010, Group Chat Administration Tool: January 2011

Client

2467763  Description of the cumulative update package for Lync 2010: January 2011

2467762 Description of the cumulative update for Lync 2010 Attendee – Administrator level installation: January 2011

2467761 Description of the cumulative update for Lync 2010 Attendee – User level installation: January 2011

2467760 Description of the cumulative update for Lync 2010 Attendant: January 2011

2493722 Description of the cumulative update for Microsoft Lync 2010 Phone Edition for Polycom CX700 and LG-Nortel IP Phone 8540: January 2011

2493724 Description of the cumulative update for Lync 2010 Phone Edition for Aastra 6721ip and Aastra 6725ip: January 2011

2493723 Description of the cumulative update for Lync 2010 Phone Edition for Polycom CX500, Polycom CX600, and Polycom CX3000: January 2011

Note: For the update version information for each CU, please refer to the follow link:

http://blogs.technet.com/b/hot/archive/2012/09/24/update-version-information-for-lync-server-2010.aspx