When you install the Microsoft Office Communicator Web Access Plug-in on a computer that is running Windows 7, you receive the following dialog box several times:
This issue occurs because of a change in the security model for Windows 7.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about the latest updates for Communications Server 2007 R2, click the following article number to view the article in the Microsoft Knowledge Base:
968802 Updates for Communications Server 2007 R2