Intended for IT Professionals, the Microsoft Communicator for Mac 2011 Deployment Guide provides guidance for using Microsoft Communicator for Mac 2011 with Microsoft Office Communications Server 2007 R2. Communicator for Mac 2011 provides real-time collaboration between people in different locations by using several methods of communication, including instant messaging (IM), presence, Web conferencing, and audio/video (A/V) conferencing.
Note:   You can also view the Communicator for Mac 2011 Deployment Guide online.
The Communicator for Mac 2011 Deployment Guide covers the following:

• Getting Started
  Overview
  Features in Communicator for Mac 2011
  System requirements for Communicator for Mac 2011
  Compare Communicator for Mac 2011 to Messenger for Mac 7
  Compare Communicator for Mac 2011 to Office Communicator 2007 R2
  Communicator for Mac 2011 topology
• Post-Installation
  Using Communicator for Mac 2011 with Office for Mac 2011
  Security best practices
  Deploying Communicator for Mac 8 preferences
  Turn on logging
• Installing and Configuring Communicator for Mac 2011 on a Corporate Network
  Deploying Communicator for Mac
  Connecting to Office Communications Server
  Uninstalling Communicator for Mac
• Technical Reference
  Communicator for Mac 2011 managed preferences
  Communicator for Mac 2011 user preferences

Download:
http://www.microsoft.com/downloads/en/details.aspx?FamilyID=7c4f539d-eb3c-422a-9b35-022970fc9c34