Article ID: 2489817 - View products that this article applies to.
Consider the following scenario:
This issue occurs because the Unified Communications Managed API (UCMA) does not reply to an UPDATE message.
To resolve this issue, install the following cumulative update:
(http://support.microsoft.com/kb/2501720/ )Description of the cumulative update for Office Communications Server 2007 R2, Unified Communications Managed API 2.0 Core Redist 64-bit: March, 2011
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Article ID: 2489817 - Last Review: March 10, 2011 - Revision: 1.0