Topic Last Modified: 2010-01-27

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

Alert Type


Rule Path

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

Rule Name

The Outlook Web App proxy failed because of a version mismatch between the source and destination servers.


This Error event indicates that a Microsoft Office Outlook Web App proxy request failed when it was sent from one computer that is running the Client Access server role to another Client Access server. This error is logged when the version of the Outlook Web App resources folders on one Client Access server does not match the version on the other Client Access server.

User Action

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

  • Make sure that both Client Access servers are running the same version of Exchange Server 2010, including Exchange 2010 service packs and software updates. 

  • If it is required that you run versions of Exchange that are not identical on your Client Access servers, follow these steps:

    1. Locate the Outlook Web App resources folder on the Client Access server that received the proxy request. The default location of the resources folder is C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\Owa\<Version>, where C:\ is the directory to which Exchange was installed.

    2. Copy the Outlook Web App resources folder to the proxying Client Access server.

    3. Restart Internet Information Services (IIS) by using the command iisreset/noforce.

    Note   The name of the resources folder <Version> is indicated by the version of the Client Access server referenced in the event description.

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.