Article ID: 939802 - View products that this article applies to.
Important This article contains information about how to modify the registry. Make sure that you back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/256986/ )Description of the Microsoft Windows registry
You receive an e-mail message from a Web Conference session presenter in Microsoft Office Communications Server. When you click the Join the Meeting link, you receive the following error message:
Additionally, you cannot join the session.
An error occurred verifying the server's certificate. For more information, please contact the server administrator.
This issue occurs because the computer that is hosting the Microsoft Office Live Meeting 2007 attendee does not have the correct certificate in the Trusted Root Certification Authorities store. This certificate must be signed by the same certification authority that provides the Web server and the certificate to the server that is running Microsoft Office Communications Server Standard Edition or to the Microsoft Office Communications Server Enterprise Edition pool.
To resolve this issue, follow these steps:
You can confirm this issue by enabling logging for the Live Meeting 2007 session presenter. To do this, follow these steps.
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.
Article ID: 939802 - Last Review: December 5, 2011 - Revision: 4.0