Do NOT Apply KB974571 to LCS/OCS Servers

Update – Please see the “Known issues that affect this security update” section in KB974571 ( for information on resolving this issue. <Removed rest of post, as the above KB article contains all relevant information>


LCS Services Fail to Start After Running the Global Settings Migration Tool

I ran into this problem recently.  I was doing a migration from LCS 2005 SP1 to OCS 2007 R2 and as part of the R2 prep we were moving the global settings to the Configuration Partition.  We followed the steps outlined in this TechNet article (, and while trying to complete Step #7, we ran…


Issues with Group Chat File Upload

I ran into a couple of issues getting the file upload feature to work in Group Chat.  I followed all of the documentation found on TechNet (, which unfortunately leaves out some important steps.  Below is a list of the issues that I ran into and the resolutions: Issue #1 When trying to upload a…


Changes to PIC Licensing

From the PressPass announcement:  Microsoft is changing its public instant messaging connectivity (PIC) license requirements for Office Communications Server connectivity to the Windows Live and AOL public IM networks. Now, customers with Office Communications Server 2007 R2 Standard CAL (or equivalent Software Assurance rights) will no longer require an additional license to connect with the…


XMPP Gateway Released

Overview The eXtensible Messaging and Presence Protocol (XMPP) Gateway for Office Communications Server allows Office Communications Server users to communicate with users who use an XMPP-based IM and presence provider such as Google Talk and Jabber. Once the gateway is deployed in an Office Communications Server environment, users hosted on Office Communications Server can do…