Topic Last Modified: 2010-11-11

The Microsoft Exchange Server 2010 Management Pack for System Center Operations Manager monitors the Windows Application log on computers running Exchange 2010 and generates this alert when the events specified in the following Details table are logged.

To learn more about this alert, in Operations Manager, do one or more of the following:


Product Name


Product Version

14.0 (Exchange 2010)

Event ID


Event Source

MSExchange OWA

Rule Path

Microsoft Exchange Server/Exchange 2010/Client Access/Outlook Web Access

Rule Name

The WebReady Document Viewing worker application can't be found.


This Error indicates that the WebReady Document Viewing service did not open an attachment as a Web page. WebReady Document Viewing lets users access file attachments in Microsoft Office Outlook Web App. Users can access common file types such as Microsoft Word documents even if the application is not installed. The event may occur if one or more of the following conditions are true:

  • The value of HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{F7CC98B4-F6F5-489D-98EB-000689C721DE}\LocalServer32\(Default) is empty. Alternatively, the file referenced by this registry key is incorrect.

  • The TranscodingService.exe file is missing from the computer that is running the Client Access server role.

User Action

To resolve this error, follow one or more of these steps:

  • Verify that the correct value exists for the registry specified in the Explanation.

    • In Registry editor, under the registry subkey HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{F7CC98B4-F6F5-489D-98EB-000689C721DE}\LocalServer32, double-click the registry key (Default).

    • In Value data, verify that the value specified is a path of the TranscodingService.exe file. The default location of the file and the registry key value is C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\owa\bin\DocumentViewing\TranscodingService.exe.

  • Verify that the TranscodingService.exe file exists in the location that is specified in the registry. If it does not exist, copy that file from the \Setup\ServerRoles\ClientAccess\owa\bin\DocumentViewing folder on the Exchange Server 2010 DVD, and then paste it to the Client Access server. The default location to replace the file on the client Access server is C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\owa\bin\DocumentViewing.

  • Remove and then re-install the Client Access server role. For more information about how to modify server roles, see Modify or Remove Exchange 2010.

  • Contact a Microsoft Support professional to resolve this issue. To contact a Microsoft Support professional, visit the Exchange Server Solutions Center. In the navigation pane, click Assisted Support Options and use one of the assisted support options to contact a Microsoft Support professional. Because your organization may have a specific procedure for directly contacting Microsoft Technical Support, be sure to review your organization's guidelines first.

For More Information

If you are not already doing so, consider running the Exchange tools created to help you analyze and troubleshoot your Exchange environment. These tools can help make sure that your configuration aligns with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. To run these tools, go to the Toolbox node of the Exchange Management Console. To learn more about these tools, see Managing Tools in the Toolbox.