The Microsoft Exchange Unified Messaging service was not able to start because the executable file “%1” for the Unified Messaging Worker Process does not exist. To resolve this issue, copy the default file located on the Exchange Server 2007 DVD into the \bin folder in the installation directory.

Details
Product: Exchange
Event ID: 1043
Source: MSExchange Unified Messaging
Version: 8.0
Symbolic Name: UMInvalidWorkerProcessPath
Message: The Microsoft Exchange Unified Messaging service was not able to start because the executable file “%1” for the Unified Messaging Worker Process does not exist. To resolve this issue, copy the default file located on the Exchange Server 2007 DVD into the \bin folder in the installation directory.
   
Explanation

This Error event indicates that the Microsoft Exchange Unified Messaging Service was not able to start because the executable file for the Unified Messaging (UM) worker process (UMWorkerProcess.exe) does not exist. The default location of this file is C:\Program Files\Microsoft\Exchange Server\bin. When the Unified Messaging Service starts, a UM worker process is also started. The Unified Messaging Service first accepts the calls sent by the IP/VoIP gateway, and then it tries to redirect the calls to the UM worker process. If the UM worker process becomes unresponsive or exceeds the lifespan, the Unified Messaging Service will retire the existing UM worker process, together with the resources it consumes, and create a new UM worker process to continue to process any new requests. When you create a new process and redirect calls to it, you can make UM more efficient and reliable, even when the original worker process that served the requests has problems.

This event may be logged when the following conditions are true:

  • The file has been deleted or renamed manually by a user.

  • The file has been deleted or quarantined by antivirus software.

   
User Action

To resolve this error, replace the UM worker process executable (UMWorkerProcess.exe) with the default file located on the Exchange Server 2007 CD. UMWorkerProcess.exe is located in the \Setup\Server Roles\Common folder on the Exchange 2007 CD. After you replace the executable, restart the Unified Messaging Service.

If you are not already doing so, consider running the tools that Microsoft Exchange offers to help administrators analyze and troubleshoot their Exchange environment. These tools can help you make sure that your configuration is in line with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. Go to the Toolbox node of the Exchange Management Console to run these tools now. For more information about these tools, see Toolbox in the Exchange Server 2007 Help.

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