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

Alert Type


Rule Path

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

Rule Name

There's an error in your Outlook Web App configuration. The authentication type specified in the Web.config file isn't correct.


This Error event will occur if the wrong authentication type is specified in the Web.config file. The authentication type must be Windows.

User Action

To resolve this error, do one or more of the following:

  • Open the Web.config file and correct the authentication type.

    1. Find the Web.config file for Microsoft Office Outlook Web App on the Client Access server. The default location is <drive>\Program Files\Microsoft\ExchangeServer\V14\ClientAccess\Owa.

    2. Make a backup copy of the file.

    3. Open the original file by using an editor such as Notepad.

    4. Find the authentication mode and verify that it is set to Windows:

      <authentication mode="windows" />

    5. Save and close the file.

  • 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.