Microsoft Exchange Server 2010 SP1 Help

Microsoft updated the Microsoft Exchange Server 2010 SP1 Help file - December 2010.
You can get it here

Microsoft Lync Server 2010 Administration Guide

Microsoft released the Microsoft Lync Server 2010 Administration Guide - December 2010.
You can get it here

Microsoft Lync 2010 - Multilingual User Interface

Microsoft released the Microsoft Lync 2010 - Multilingual User Interface.
You can get it here: x32 or x64

Migrating from Office Communications Server 2007 to Lync Server 2010

Microsoft released the Migrating from Office Communications Server 2007 to Lync Server 2010 document - December 2010.
You can get it here

Microsoft Exchange Server 2010 Update Rollup 5

Microsoft released the Update Rollup 5 for Exchange Server 2010.
See description in KB2407113 and download from here

Update Rollup 2 for Exchange Server 2010 Service Pack 1

Microsoft has released Update Rollup 2 for Exchange Server 2010 Service Pack 1
See info about the update here and download from here

Microsoft Office Communications Server 2007 R2 Operations Guide

Microsoft released the Microsoft Office Communications Server 2007 R2 Operations Guide.
You can get it here

Microsoft Forefront Unified Access Gateway 2010 SP1

Microsoft has released Forefront Unified Access Gateway SP1
You can get it here

Publishing Outlook Web App and Exchange ActiveSync Using Certificate Based Authentication with Forefront TMG or Forefront UAG

Microsoft has released the Publishing Outlook Web App and Exchange ActiveSync Using Certificate Based Authentication with Forefront TMG or Forefront UAG document - December 2010
You can get i here

Microsoft Lync 2010 SDK

Microsoft released the Lync 2010 SDK
Download from here

Updates for Microsoft Office Communications Server 2007 R2, November 2010

Microsoft released an update for Microsoft Office Communications Server 2007 R2 v3.5.6907.221 See description in KB968802 and download from here

Microsoft Live Meeting 2007 Client Update: November 2010

Microsoft has released v8.0.6362.191 of the Microsoft Live Meeting 2007 client
See info about the Microsoft Live Meeting 2007 Client update here and download from here
See info about Microsoft Live Meeting Conferencing Add-in for Outlook update here and download from here

Microsoft Office Communications Server 2007 R2 XMPP Gateway, November 2010

Microsoft released Office Communications Server 2007 R2 XMPP Gateway, v3.5.6907.221
Se description in KB2404570 and download from here

Microsoft Office Communicator 2007 R2, November 2010

Microsoft released Office Communicator 2007 R2, v3.5.6907.221
See description in KB2291453 and download from here

Microsoft Office Communicator 2007 R2 Phone Edition

Microsoft released Microsoft Office Communicator 2007 R2, Phone Edition v6907.222
Se description in KB2466291 and download from here

Microsoft Lync Server 2010 Resource Kit Tools

Microsoft released Lync Server 2010 Resource Kit Tools
Download from here

Microsoft Lync 2010 Phone Edition for Polycom CX700 and LG-Nortel IP Phone 8540

Microsoft released Microsoft Lync 2010 Phone Edition for Polycom CX700 and LG-Nortel IP Phone 8540, v4.0.7576.0
Download from here

Microsoft Lync 2010 Quick Start Guides

Microsoft released Lync 2010 Quick Start Guides.
You can get it here

Microsoft Lync 2010 What's New Videos and Article

Microsoft released some short videos that highlight new features in Lync 2010 .
You can get it here

Microsoft Lync 2010 Short Videos

Microsoft released some short videos that highlight the most commonly used Lync 2010 features.
You can get it here

Microsoft Lync 2010 Work Smart Guides

Microsoft released the Microsoft Lync 2010 Work Smart Guides.
You can get it here

Microsoft Lync Server 2010 Protocol Workloads Poster

Microsoft released the Microsoft Lync Server 2010 Protocol Workloads Poster.
You can get it here

Microsoft Lync Server 2010 Documents

Microsoft released the November version of the Microsoft Lync Server 2010 Documents

• Microsoft Lync Server 2010 Active Directory Guide, get it here
• Microsoft Lync Server 2010 Announcement Deployment Guide, get it here
• Microsoft Lync Server 2010 Archiving Deployment Guide, get it here
• Microsoft Lync Server 2010 Call Park Deployment Guide, get it here
• Microsoft Lync Server 2010 Client and Device Deployment Guide, get it here
• Microsoft Lync Server 2010 Device Management and Troubleshooting Guide, get it here
• Microsoft Lync Server 2010 Documentation Help File, get it here
• Microsoft Lync Server 2010 Edge Server Deployment Guide, get it here
• Microsoft Lync Server 2010 Enterprise Edition Deployment Guide, get it here
• Microsoft Lync Server 2010 Enterprise Voice Deployment Guide, get it here
• Microsoft Lync Server 2010 Getting Started Guide, get it here
• Microsoft Lync Server 2010 Group Chat Administration Guide, get it here
• Microsoft Lync Server 2010 Group Chat Deployment Guide, get it here
• Microsoft Lync Server 2010 Monitoring Deployment Guide, get it here
• Microsoft Lync Server 2010 Planning Guide, get it here
• Microsoft Lync Server 2010 Reference: Call Data Recording and Quality of Experience Database Schema, get it here
• Microsoft Lync Server 2010 Response Group Deployment Guide, get it here
• Microsoft Lync Server 2010 Standard Edition Deployment Guide, get it here
• Microsoft Lync Server 2010 Supportability Guide, get it here
• Migrating from Communications Server 2007 R2 to Lync Server 2010, get it here
• Enabling QoS with Microsoft Lync Server 2010, get it here

Microsoft Lync 2010 Training

Microsoft released v1.0 of the Microsoft Lync 2010 Training.

• Microsoft Lync 2010 Attendant
• Microsoft Lync 2010 Conferencing and Collaboration
• Microsoft Lync 2010 Delegate
• Microsoft Lync 2010 Device
• Microsoft Lync 2010 IM and Presence
• Microsoft Lync 2010 RGS
• Microsoft Lync 2010 Web App

Get it here

 

Microsoft Exchange 2010 Visio Stencil

Microsoft released the November version of the Microsoft Exchange 2010 Visio Stencils, you can get it here

Publishing Microsoft Exchange Server 2010 with Forefront Unified Access Gateway 2010 and Forefront Threat Management Gateway 2010

Microsoft has updated the Publishing Exchange Server 2010 with Forefront Unified Access Gateway 2010 and Forefront Threat Management Gateway 2010 document - August 2010
You can get i here

Public IM Connectivity Provisioning Guide for Microsoft Lync Server, Office Communications Server, and Live Communications Server

Microsoft released v4.0 of the Public IM Connectivity Provisioning Guide.

You can get it here

Microsoft Exchange Server 2010 SP1 Help

Microsoft updated the Microsoft Exchange Server 2010 SP1 Help file. You can get it here

Microsoft Exchange Server 2010 Architecture Poster

Microsoft released the Microsoft Exchange Server 2010 Architecture Poster.
You can get it here

Adoption Reporting Tool for Microsoft Office Communications Server 2007 R2

Microsoft has released the Adoption Reporting Tool for Microsoft® Office Communications Server 2007 R2 v3.5.6907.216, you can get i here

Microsoft Office Communications Server 2007 R2 Workload Architecture Poster

Microsoft updated the Microsoft Office Communications Server 2007 R2 Workload Architecture Poster.
You can get it here

Update Rollup 1 for Exchange Server 2010 Service Pack 1

Microsoft has released Update Rollup 1 for Exchange Server 2010 Service Pack 1
See info about the update here and download from here

Microsoft Exchange Server 2010 Install Guide Templates: Oktober 2010

Microsoft has updated the Microsoft Exchange Server 2010 Install Guide Templates, you can get them here

Microsoft Office Communications Server 2007 R2, Unified Communications Managed API 2.0 Core Redist 64-bit: September 2010

Microsoft released a update for Microsoft Office Communications Server 2007 R2, Unified Communications Managed API 2.0 Core v.3.5.6907.215
See description in KB2400399 and download from here

Updates for Microsoft Office Communications Server 2007 R2, September 2010

Microsoft released a update for Microsoft Office Communications Server 2007 R2 v3.5.6907.215

See description in KB968802 and download from here

Forefront Unified Access Gateway Update 2

Microsoft has released the Forefront Unified Access Gateway Update 2, you can get i here

Software Update 1 for Microsoft Forefront Threat Management Gateway 2010 SP1

Microsoft has released the Software Update 1 for Microsoft Forefront Threat Management Gateway 2010 SP1, you can get i here

Microsoft Exchange 2010 Unified Messaging PBX Configuration Note for Cisco Unified Communications Manager 7.0

Microsoft updated the Cisco-CuCM_7.0-Direct_SIP_Connection with Exchange 2010 UM.doc, you can get i here

Microsoft Exchange 2010 Unified Messaging Troubleshooting Tool

Microsoft has released the Unified Messaging Troubleshooting Tool v1.0, you can get i here

Update Rollup 1 for Exchange Server 2007 Service Pack 3

Microsoft has released Update Rollup 1 for Exchange Server 2007 Service Pack 3

See info about the update here and download from here

Microsoft Exchange Server 2010 SP1 Help

Microsoft released the Microsoft Exchange Server 2010 SP1 Help file. You can get it here

Microsoft Exchange Server 2010 SP1 UM Language Packs

Microsoft has released Exchange Server 2010 SP1 UM Language Packs

Download from here

Microsoft Exchange Server 2010 Service Pack 1

Microsoft has released Exchange Server 2010 Service Pack 1
Read about it here, and download from here

Microsoft Office Communications Server 2007 R2, Unified Communications Managed API 2.0 Core Redist 64-bit: August 2010

Microsoft released a update for Microsoft Office Communications Server 2007 R2, Unified Communications Managed API 2.0 Core v6907.210

See description in KB2282949 and download from here

Protecting Exchange Server with System Center Data Protection Manager 2010

Microsoft has released the Protecting Exchange Server with System Center Data Protection Manager 2010 whitepaper, download from here

Microsoft Live Meeting 2007 Client Update: July 2010

Microsoft has released v8.0.6362.190 of the Microsoft Live Meeting 2007 client

See info about the Microsoft Live Meeting 2007 Client update here and download from here
See info about Microsoft Live Meeting Conferencing Add-in for Outlook update here and download from here

Updates for Microsoft Office Communications Server 2007 R2, July 2010

Microsoft released a update for Microsoft Office Communications Server 2007 R2 v6907.209
See description in KB968802 and download from here

Microsoft Office Communications Server 2007 R2 Group Chat Server, July 2010

Microsoft released Office Communications Server 2007 R2 Group Chat Server v3.5.6907.206
Se description in KB2032881 and download from here

Microsoft Office Communications Server 2007 R2 Group Chat Client, July 2010

Microsoft released Office Communications Server 2007 R2 Group Chat Client v3.5.6907.206
Se description in KB2032922 and download from here

Microsoft Office Communicator 2007 R2, Phone Edition, July 2010

Microsoft released Microsoft Office Communicator 2007 R2, Phone Edition v6907.207
Se description in KB2267962 and download from here

Microsoft Office Communicator 2007 R2, July 2010

Microsoft released Office Communicator 2007 R2, v3.5.6907.206
See description in KB2028888 and download from here

Microsoft Exchange 2010 Unified Messaging Troubleshooting Tool - Beta

Microsoft has released the Unified Messaging Troubleshooting Tool, you can get i here

Publishing Microsoft Exchange Server 2010 with Forefront Unified Access Gateway 2010 and Forefront Threat Management Gateway 2010

Microsoft has released the Publishing Exchange Server 2010 with Forefront Unified Access Gateway 2010 and Forefront Threat Management Gateway 2010 document, you can get i here

Microsoft Office Communicator Mobile 2007 R2, July 2010

Microsoft released Microsoft Office Communicator Mobile 2007 R2, v6906.29

Se description in KB969816. Download the Smartphone or the Pocket PC version.

Exchange Server 2010 Deployment Assistant v1.0.7.9

Microsoft updated the Exchange Server 2010 Deployment Assistant, check it out here

Microsoft Exchange 2010 Unified Messaging PBX Configuration Note for Cisco Unified Communications Manager 7.0

Microsoft has released the Cisco-CuCM_7.0-Direct_SIP_Connection with Exchange 2010 UM.doc, you can get i here

Microsoft Exchange Server 2007 Service Pack 3

Microsoft has released Exchange Server 2007 Service Pack 3.
Read about it here, and download from here

Microsoft Exchange Server 2010 Update Rollup 4

Microsoft released the Update Rollup 4 for Exchange Server 2010.
See description in KB982639 and download from here

Microsoft Unified Communications Managed API 2.0 SDK

Microsoft released Microsoft Unified Communications Managed API 2.0 SDK v6907.205

Download from here x32 or x64

Microsoft Office Communications Server Netmon Parsers

Microsoft released Office Communications Server Netmon Parsers v3.5, download from here
You can download Microsoft Network Monitor v3.3 here

Microsoft Office Communicator 2007 R2 Help Documentation

Microsoft released the Microsoft Office Communicator 2007 R2 Help Documentation v1.0, you can get it here

Microsoft Office Communicator 2007 Help Documentation

Microsoft released the Microsoft Office Communicator 2007 Help Documentation v1.0, you can get it here

Microsoft Office Communications Server 2007 R2 Web Scheduler v6907.196

Microsoft released a update for Microsoft Office Communications Server 2007 R2 Web Scheduler v6907.196

See description in KB980374 and download from here

Microsoft Office Communications Server 2007 R2, Unified Communications Managed API 2.0 Core Redist 64-bit: May 2010

Microsoft released a update for Microsoft Office Communications Server 2007 R2, Unified Communications Managed API 2.0 Core v6907.202

See description in KB982614 and download from here

Microsoft Office Communications Server 2007 R2 Group Chat Client, April 2010

Microsoft released Office Communications Server 2007 R2 Group Chat Client v3.5.6907.198

Se description in KB980043 and download from here

Microsoft Office Communications Server 2007 R2 Group Chat Server, April 2010

Microsoft released Office Communications Server 2007 R2 Group Chat Server v3.5.6907.198
Se description in KB980042 and KB982128 download from here

Microsoft Communicator Mobile for Nokia in Nokia’s Ovi Store

Microsoft and Nokia released Microsoft Communicator Mobile for Nokia devices
Read about it here, and get it from Ovi Store

Microsoft Office Communicator 2007, May 2010

Microsoft released Microsoft Office Communicator 2007 Client v2.0.6362.188

Se description in KB974599 and download from here

Microsoft Office Communications Server 2007 R2 Documentation v1.5

Microsoft updated the Office Communications Server 2007 R2 documentation. Download it here

Voicemail: A story of unrealized potential

Read about Exchange 2010's Unified Messaging capabilities here

Future Licensing Changes to Microsoft Communications Server 2010, April 2010

Read about the new licensing here

Microsoft Office Communicator 2007 R2, April 2010

Microsoft released Office Communicator 2007 R2, v3.5.6907.196
Se description in KB978564 and download from here

Hardware Load Balancing with Office Communications Server 2007 R2

Microsoft released the Hardware Load Balancing with Office Communications Server 2007 R2 document, you can get it here

Microsoft Exchange Server 2010 Install Guide Templates: April 2010

Microsoft released the Microsoft Exchange Server 2010 Install Guide Templates, you can get them here

Updates for Microsoft Office Communications Server 2007 R2, April 2010

Microsoft released a update for Microsoft Office Communications Server 2007 R2 v6907.196

See description in KB968802 and download from here (Note the Cumulative Server Update Installer)

Microsoft Office Communicator 2007 R2, Phone Edition, April 2010

Microsoft released Microsoft Office Communicator 2007 R2, Phone Edition v6907.187
Se description in KB981526 and download from here

Unified Communications Phones and Peripherals Datasheet v040710

Microsoft released v040710 of the Unified Communications Phones and Peripherals Datasheet, you can get it here

Microsoft Live Meeting 2007 Client Update: April 2010

Microsoft has released v8.0.6362.187 of the Microsoft Live Meeting 2007 client

See info about the Microsoft Live Meeting 2007 Client update here and download from here
See info about Microsoft Live Meeting Conferencing Add-in for Outlook update here and download from here

Update Rollup 4 for Exchange Server 2007 Service Pack 2

Microsoft has released Update Rollup 4 for Exchange Server 2007 Service Pack 2
You can get it here

Microsoft Exchange Server 2010 Update Rollup 3

Microsoft released the Update Rollup 3 for Exchange Server 2010. You can get it here

Microsoft Exchange Server Public Folder DAV-based Administration Tool

Microsoft released the Microsoft Exchange Server Public Folder DAV-based Administration Tool v06.05.8164, you can get it here

Microsoft Exchange Server 2010 Install Guide Templates

Microsoft released the Microsoft Exchange Server 2010 Install Guide Templates, you can get them here

Office Communications Server 2007 R2 on Windows Server 2008 R2

Check Supportability is available for Office Communications Server 2007 R2 member server role on a Windows Server 2008 R2 operating system

HD Video in Office Communicator 2007 R2

Clive Graven has a great article on Microsoft|TechNet about HD Video in OCS 2007 R2

Update Rollup 3 for Exchange Server 2007 Service Pack 2

Microsoft has released Update Rollup 3 for Exchange Server 2007 Service Pack 2
See info about the update here and download from here

Unified Communications Phones and Peripherals Datasheet v030410

Microsoft released v030410 of the Unified Communications Phones and Peripherals Datasheet, you can get it here

Microsoft Office Communications Server 2007 R2 Design Guide

Microsoft released the Microsoft Office Communications Server 2007 R2 Design Guide, you can get it here

Microsoft Exchange Server 2010 Update Rollup 2

Microsoft released the Update Rollup 2 for Exchange Server 2010. You can get it here

Polycom® CX300

Jason Tuck and Alex Darrow has written a great article about the Polycom® CX300 device on the Office Communicator Team Blog

Microsoft Office Communicator 2007: Presence Integration Between IM Applications and 2007 Microsoft Office System

Microsoft released v1.1 of the Microsoft Presence Integration Between IM Applications and 2007 Microsoft Office System document, you can get it here

Beta Exam 71-704 extended for 2 weeks

Due to extreme winter weather conditions, Microsoft is extending Beta Exam 71-404, OCS 2007 R2 Voice Specialization for another two weeks.

Register for FREE with code OCSR2J for BETA Exam 71-404 Prometric sites.

Candidates should plan for up to four hours to take the Beta exam and provide feedback on every question (versus the typical two hours to take Released version exams.)

It is highly recommended that candidates for Exam 74-404 (Beta 71-404) have experience with OCS 2007 R2 and have completed the Unified Communications Voice Ignite v 2.0 (R2) Workshop. A preparation guide for the exam is available here

The exam is available in English only.
For questions to Microsoft Learning about the exam, email jseymour@microsoft.com

Microsoft Office Communicator 2007 R2 Group Policy Field Guide

Microsoft released v1.1 of the Microsoft Office Communicator 2007 R2 Group Policy Field Guide, you can get it here

Additional Windows Live Messenger PIC/Federation IP Address - Postponed

Tomorrow’s planned added capacity has been postponed for technical reasons and to provide additional time for administrators to update their firewall settings if necessary to reflect the additional IP address. The new date that this work is scheduled to go into place is Friday, March 26, 2010. For organizations that have chosen to restrict this traffic to specific IP addresses, you must have the list in KB897567 in place prior to Friday, March 26, 2010 or PIC connectivity with MSN will fail.

Exchange Server 2010 Help

Microsoft released Feb2010 of the Microsoft Exchange Server 2010 Help file. You can get it here

Microsoft Office Communicator 2007 R2 Group Policy Field Guide

Microsoft released v1.0 of the Microsoft Office Communicator 2007 R2 Group Policy Field Guide, you can get it here

Unified Communications Phones and Peripherals Datasheet v012810

Microsoft released v012810 of the Unified Communications Phones and Peripherals Datasheet, you can get it here

Microsoft Office Communications Server Public IM Connectivity Provisioning Guide v3.0

Microsoft released v3.0 of the OCS PIC Provisioning Guide.
You can get it here

Microsoft Office Communications Server 2007 R2 XMPP Gateway, January 2010

Microsoft released Office Communications Server 2007 R2 XMPP Gateway, v3.5.6907.89

Se description in KB979311 and download from here

Microsoft Office Communications Server 2007 R2 Workload Architecture Poster v1.0

This poster of Office Communications Server 2007 R2 describes the traffic flow of protocols and ports used in each workload. Communications Server 2007 R2 supports the following workloads: IM and Presence, Conferencing, Application Sharing, and Enterprise Voice. These filtered views can assist you in architecting your deployment of Communications Server 2007 R2. The different server roles are described along with server certificate requirements. Firewall and DNS configuration requirements are also described.
Get it here

Microsoft Live Meeting 2007 Client Update: January 2010

Microsoft has released v8.0.6362.149 of the Microsoft Live Meeting 2007 client
See info about the Microsoft Live Meeting 2007 Client update here and download from here
See info about Microsoft Live Meeting Conferencing Add-in for Outlook update here and download from here

BETA Exam 71-404 OCS 2007 R2 – UC Voice Specialization, Will Be Available January 25, 2010

Beginning January 25th partners will be able take the Beta version of the new OCS 2007 Release 2 UC Voice Specialization exam for FREE at Prometric sites around the world. By participating in this BETA exam, you have the opportunity to provide feedback to the Microsoft Certification program about the exam content which is integral to development of its Released 74-404 version.

Exam 74-404 (Beta Exam 71-404) is designed to validate the skills and experience of technical professional to design, deploy, and administer Microsoft Voice solutions in production based on Microsoft® Office Communications Server 2007 Release 2 (OCS 2007 R2) and including interoperability with OCS 2007, Microsoft® Exchange Server 2007 Unified Messaging, Microsoft® Windows Server Active Directory, gateways and Private Branch Exchanges (PBX’s).

It is highly recommended that candidates for Exam 74-404 have experience with OCS 2007 R2 and have completed the Unified Communications Voice Ignite v 2.0 (R2) Workshop. A preparation guide for the exam will be available soon. Click here for more details.

Registration for BETA Exam 71-404 will begin this Friday, January 22, 2010 at Prometric sites. The code to register for the Beta exam for FREE is: OCR2J. Candidates should plan for up to four hours to take the Beta exam and provide feedback on every question (versus the typical two hours to take Released version exams.) The exam will be available in English only. For questions about the exam, email James Seymour (jseymour@microsoft.com) at Microsoft Learning.


Candidates who take the BETA exam will be scored pass or fail, after Microsoft completes the analysis of the BETA exam and poor questions and answers have been eliminated. A technical professional who passes the Beta exam will not need to take the Released version; the passing credit will be added to their transcript. The Partner UC Competency criteria will be updated to include Exam 74-404 OCS 2007 R2, UC Voice Specialization.

Microsoft Office Communications Server 2007 R2, PreCallDiagnostic Resource Kit Tool v3.5.6907.90

The PreCallDiagTool is an application that reports expected audio quality as it relates to the network effect. The tool should be installed on any desktop or laptop PC that suffers from inconsistent network connection quality. The PreCallDiagTool can provide a quick check of the current network conditions and also preserve a history of quality data to let users profile their network performance over time or other conditions. The tool is particularly useful for home/mobile users and users using WIFI access points.
You can download from here: x32 and x64

Additional Windows Live Messenger PIC/Federation IP Addresses, February 2, 2010

In an effort to provide enhanced capacity and service reliance, Windows Live Messenger will soon be adding an additional IP address used for PIC/Federation traffic. Some organizations have chosen to restrict this type of traffic to specific IP addresses, as referenced in Microsoft KB897567. With this in mind we want to give you advanced notice of our intended change if you have configured your enterprise network in this manner.

Please ensure your enterprise firewall configuration is updated with the full list of Windows Live Messenger addresses below on or before Friday, February 2, 2010. Windows Live Messenger will NOT enable the additional IP addresses until on or after February 2, 2010 (Pacific Time) to ensure your services will not be disrupted by this change.

IP address for Windows Live Messenger PIC/Federation:
64.4.9.181
64.4.9.245
64.4.50.110 <= New IP address
65.54.52.53
65.54.52.245
65.54.227.249

Microsoft Office Communications Server 2007 R2 Client Group Policy Documentation v2.0

Microsoft released v2.0 of the Office Communications Server 2007 R2 Client Group Policy Documentation, you can get it here

Exchange Server 2010 Deployment Assistant

Running Exchange 2003 or Exchange 2007 and want to deploy Exchange 2010?
Check the Exchange Server 2010 Deployment Assistant

Microsoft Office Communicator 2007 R2, Phone Edition, January 2010

Microsoft released Microsoft Office Communicator 2007 R2, Phone Edition v6907.82
Se description in KB978737 and download from here

Updates for Microsoft Office Communications Server 2007 R2, January 2010

Microsoft released a update for Microsoft Office Communications Server 2007 R2 v6907.83
Se description in KB977345 and download from here (Note the Cumulative Server Update Installer)

Microsoft Office Communicator 2007 R2, January 2010

Microsoft released Office Communicator 2007 R2, v3.5.6907.83
Se description in KB976135 and download from here