Article ID: 972724 - View products that this article applies to.
In Microsoft Office Communications Server 2007 R2, a user tries to dial into a conference through the conferencing attendant as the conference leader or as an authenticated. In this case, the user must use a telephone extension or a full telephone number. However, the dial-in conferencing page does not provide this information to the user if one of the following conditions is true:
To resolve this issue, apply the following update:
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
969824Note After users apply this update, the dial-in conferencing page provides more feedback to describe an error situation. This update also helps users determine whether the user should use a telephone extension or a full telephone number to dial in as the conference leader or as an authenticated user.
(http://support.microsoft.com/kb/969824/ )Description of the update package for Office Communications Server 2007 R2, Communicator Web Access: July 2009
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.