You install Microsoft Office Communications Server (OCS) 2007 R2 on a Windows Server 2008 server. However, when you try to use an application that is based on OCS 2007 R2, Unified Communications Managed API 2.0 Core Redist 64-bit, the application crashes.
This issue occurs when you use a Web URL instead of the Session Initiation Protocol (SIP) Uniform Resource Identifier (URI) for a Centralized Conference Control Protocol conf-info element. In this scenario, the application creates an unhandled exception. This exception causes the application to crash.
How to obtain the hotfix
This issue is fixed in the Office Communications Server 2007 R2, Unified Communications Managed API 2.0 Core Redist 64-bit hotfix package that was released on October, 2009. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
974007 Description of the Cumulative Update for Office Communications Server 2007 R2, Unified Communications Managed API 2.0 Core Redist 64-bit: October 2009
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.