This is my first OCS related post.
In this first post I would to make available the information regarding KB974571 and the disruption it causes to OCS and LCS systems.
The KB is now on version 4.0 and it was re-writen to face the errors stated from our customers.
Kb is available at : http://support.microsoft.com/kb/974571/en-us .
This revision, 4.0, has this new content, which is especially usefull for OCS and LCS administrators :
Services that are required by Communications Server are not started after you install this update and then restart a computer that is running any of the following versions of Communications Server:
*The licensed production version of this application is not affected by this known issue. Only Office Communicator clients that are in their 180-day evaluation period are affected by this issue. When this problem occurs, the following error events are logged in the Application logs in the Event Viewer of the affected servers:
When this problem occurs, the required services behave as if an expired trial version of the product is installed. This behavior affects the whole Communications Server enterprise that is hosted by the affected server or servers. Microsoft is investigating this issue, and will determine the most appropriate way to address it. Customers who are not running OCS or LCS server are not affected by this known issue, and can safely ignore this issue.Customers who have deployed the OCS or LCS product on a server should assess the risk that is involved to decide whether to install the security update on that server. These customers should revisit this Knowledge Base article often, because this article will be updated as soon as more information and a resolution are available.
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Thus far, the only solution for this is to remove the KB and reboot the server.
- UPDATED - FIX AVAILABLE AT :
UPDATE - Issues in OCS 2007/ LCS 2005 caused by applying KB974571http://blogs.technet.com/jribeiro/archive/2009/11/05/update-issues-in-ocs-2007-lcs-2005-caused-by-applying-kb974571.aspx
So being, I strongly encourage evryone to check the KB regularly, as new information may become available.