Microsoft KB Archive/922232

= A message session cannot be completed when an internal user or a remote user uses Office Live Communications Server 2005 to initiate a conversation =

Article ID: 922232

Article Last Modified on 7/27/2006

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APPLIES TO


 * Microsoft Office Live Communications Server 2005 Enterprise Edition
 * Microsoft Office Live Communications Server 2005 Standard Edition

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SYMPTOMS
When an internal user or a remote user uses Microsoft Office Live Communications Server 2005 to initiate a conversation to a remote user who is connected by using an access proxy, the message session cannot be completed.



CAUSE
This problem occurs if the following conditions are true:
 * The initiating user is not enabled for federation.
 * A network address translation (NAT) device exists between the internal edge of the access proxy and the access proxy's internal next-hop server.

Note An example of a NAT device is a firewall.



How to obtain the hotfix
This issue is fixed in the Live Communications Server 2005 post-Service Pack 1 Hotfix Package July 21, 2006. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

921543 Description of the Live Communications Server 2005 post-Service Pack 1 hotfix package: July 21, 2006



WORKAROUND
To work around this problem, enable the user for federation. To do this, follow these steps:
 * 1) Log on to Live Communications Server 2005.
 * 2) Start the Active Directory Users and Computers snap-in. To do this, click Start, click Run, type dsa.msc, and then click OK.
 * 3) In the Users container, right-click the user name that you want to enable, and then click Properties.
 * 4) Click the Live Communications tab.
 * 5) Click Advanced Settings, and then click Enable Federation.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.

Keywords: kbofficelcs2005presp2fix kbexpertisebeginner kbqfe kbbug kbfix kbpubtypekc KB922232

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