There is an error in your Outlook Web Access configuration.The authentication type specified in the %1Web.config file is incorrect. The correct authentication type is “Windows”.

Details
Product: Exchange
Event ID: 29
Source: MSExchange OWA
Version: 8.0
Symbolic Name: WebConfigAuthenticationIncorrect
Message: There is an error in your Outlook Web Access configuration.The authentication type specified in the %1Web.config file is incorrect. The correct authentication type is “Windows”.
   
Explanation

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 Outlook Web Access on the Client Access server. The default location is <drive>\Program Files\Microsoft\ExchangeServer\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.

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

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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