Microsoft KB Archive/937307

= Error message when you try to install Communications Server 2007 on a computer that is running Exchange Server 2007 and that has the Unified Messaging component installed: &quot;Unable to bind for Socket&quot; =

Article ID: 937307

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
When you try to install Microsoft Office Communications Server 2007 on a computer that is running Microsoft Exchange Server 2007, you receive the following error message if the Unified Messaging component is installed:

Unable to bind for Socket



CAUSE
The Exchange 2007 Unified Messaging component has a UMWorkerProcess.exe service that runs on TCP port 5061 and listens on TCP port 5061. Communications Server 2007 has a service that tries to bind to the same port.

The TCP port is hard-coded in the Exchange 2007 Unified Messaging component. Therefore, you cannot change the TCP port in the Exchange 2007 Unified Messaging component. Exchange 2007 and Communications Server 2007 cannot exist on the same computer if Exchange 2007 has the Unified Messaging component installed.

This issue may also occur if another application is listening on TCP port 5061 or if the IP address is invalid.



WORKAROUND
To work around the issue, make sure that no other application is listening on TCP port 5061 and that the IP address is valid.

Keywords: kbprb kbtshoot kbexpertiseinter kberrmsg KB937307

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