Topic Last Modified: 2010-01-25

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

An Outlook Web App configuration setting isn't valid. The authentication type specified on the Outlook Web App virtual directory is Anonymous.


This Error event can occur if Internet Information Server (IIS) has been used to configure the authentication settings for the Microsoft Office virtual directory. Outlook Web App authentication settings should be configured only by using the Exchange Management Console or the Exchange Management Shell.

User Action

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

  • Correct the setting by using the Exchange Management Shell.

    1. On the computer that is running Exchange Server 2010 that has the Client Access Server role installed, open the Exchange Management Shell.

    2. Use the Set-OwaVirtualDirectory cmdlet to reset the authentication method. For example, if you have forms-based authentication turned on, use the following command to reset it:

      set-owavirtualdirectory -identity "<server name>\owa (default web site)" -formsauthentication $true

    3. You may see a warning that the cmdlet ran successfully but that no change was made. Disregard this warning.

  • 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 about how to configure Outlook Web App authentication see Managing Outlook Web App Security.

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.