Microsoft KB Archive/937297

= Error message when you use Communicator 2005 and Live Communications Server 2005 to send instant messages to Communicator 2005 users who have logged on to Communications Server 2007: &quot;The following message could not be delivered to all recipients&quot; =

Article ID: 937297

Article Last Modified on 8/15/2007

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APPLIES TO


 * Microsoft Office Communications Server 2007 Enterprise Edition
 * Microsoft Office Communications Server 2007 Standard Edition

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SYMPTOMS
Consider the following scenario. You use Microsoft Office Communicator 2005 to log on to Microsoft Office Live Communications Server 2005. Another user uses Communicator 2005 to log on Microsoft Office Communications Server 2007. In this scenario, when you try to send instant messages to the user who logged on to Communications Server 2007, the user does not receive the instant messages. Additionally, you receive the following error message:

The following message could not be delivered to all recipients possibly because one or more persons are offline.

Note The presence information is correct. The presence information shows that the recipient is ready to receive instant messages.



RESOLUTION
To resolve this issue, install the Live Communications Server 2005 post-Service Pack 1 hotfix package that is dated 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 issue, the other user must use Microsoft Office Communicator 2007 instead of Communicator 2005 to log on to Communications Server 2007.

Keywords: kbtshoot kberrmsg kbexpertiseinter kbprb KB937297

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