Participants who use Communicator 2007 R2 or Live Meeting 2007 hear short noise spurts through the Audio Video Multipoint Conferencing Unit in multipoint calls

Participants hear short noise spurts through the Audio Video Multipoint Conferencing Unit (AVMCU) in multipoint calls. These noise spurts are more frequent and noticeable when the participants use one of the following clients:

• Microsoft Office Communicator 2007 R2
• Live Meeting 2007 together with the March 2009 release of the Live Meeting 2007 client update package

To resolve this issue install the Hotfix rollup that is described in the following Microsoft Knowledge Base article: For more information, click the following article number to view the article in the Microsoft Knowledge Base:

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.