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