Process %1 (PID=%2). Unhandled exception occured in worker thread %3. Exception message: %4 Current synchronization task is aborted.

Details
Product: Exchange
Event ID: 1007
Source: MSExchangeFDS
Version: 08.01.0106.000
Symbolic Name: UnhandledExceptionInWorkerThread
Message: Process %1 (PID=%2). Unhandled exception occured in worker thread %3. Exception message: %4 Current synchronization task is aborted.
   
Explanation

This Error event indicates that the Microsoft Exchange File Distribution service did not finish the file synchronization task because of an error. The File Distribution service is used to distribute offline address books and custom Unified Messaging prompts. This event may occur for various reasons.

   
User Action

To determine the root cause of this Warning event, follow these steps:

  1. Use the following Exchange Management Shell cmdlet to increase the diagnostic logging level on the General counter of the MSExchangeFDS performance object to the High setting:

    Set-EventLogLevel MSExchangeFDS\General -Level High

    Note   For detailed information about increasing logging, see How to Change Logging Levels for Exchange Processes.

  2. Review other related Error and Warning events in the Application log. These related events may help you determine the root cause of this error.

  3. Use the following Exchange Management Shell cmdlet to set the diagnostic logging level on the General counter of the MSExchangeFDS performance object back to the default Lowest setting:

    Set-EventLogLevel MSExchangeFDS\General -Level Lowest

    Important   After you have completed troubleshooting this issue, you should always return logging to the default level to avoid filling your event logs.

Note  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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