There is an error in your Outlook Web Access configuration.The authentication type specified on the OWA virtual directory is set to Anonymous. This check box must be cleared for Outlook Web Access to function properly.

Details
Product: Exchange
Event ID: 30
Source: MSExchange OWA
Version: 8.0
Symbolic Name: VDirAnonymous
Message: There is an error in your Outlook Web Access configuration.The authentication type specified on the OWA virtual directory is set to Anonymous. This check box must be cleared for Outlook Web Access to function properly.
   
Explanation

This Error event can occur if Internet Information Server (IIS) has been used to configure the authentication settings for the Outlook Web Access virtual directory. Outlook Web Access 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 2007 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.

  • If you have difficulty resolving the issue, contact Microsoft Customer Support. For information about how to contact support, visit Microsoft Help and Support.

For more information about how to configure Outlook Web Access Authentication see Managing Outlook Web Access Security.

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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