Update Rollup for Office Communicator 2007 R2 (KB2755391)

This package fixes the issues described in KB2755391...

Security Update for Office Communicator 2007 R2 (KB2726391)

A security issue has been identified that could allow an authenticated remote attacker to compromise your system and gain control over it. You can help protect your system by installing this update from Microsoft. After you install this update, you may have to restart your system...