January 2010 Office Communications Server 2007 R2 updates
Client updates:
Communicator 2007 R2 cumulative update: January 2010 here
Server updates:
Office Communications Server 2007 R2 cumulative update: January 2010 here
Office Communications Server 2007 R2 Administrative Tools cumulative update: January 2010 here
Office Communications Server 2007 R2 Core Components cumulative update: January 2010 here
Office Communications Server 2007 R2 Database cumulative update: January 2010 here
Office Communications Server 2007 R2 Unified Communications Managed API 2.0 Core Redist 64-bit: January 2010 here