You receive a "Page not found" error message when you use Outlook Web Access (OWA) to browse the Exchange Server 2003 client after you install Windows SharePoint Services (823265)

RESOLUTION

To resolve this problem, and to have Windows SharePoint Services and Exchange Server 2003 both function correctly, you must enable Kerberos authentication and exclude the folders (directories) that Microsoft Exchange Server 2003 uses. To do so, follow these steps:

1. Configure the virtual server that is running Windows SharePoint Services and Exchange Server 2003 programs to use Kerberos authentication.
   
   When a virtual server is extended with Windows SharePoint Services, Kerberos authentication is disabled Integrated Windows authentication is enabled. For Exchange Server 2003 to work correctly, you must configure the virtual server to use Kerberos authentication. For more information about how to configure Windows SharePoint Services to Use Kerberos authentication, click the following article number to view the article in the Microsoft Knowledge Base:

   832769 How to configure a Windows SharePoint Services virtual server to use Kerberos authentication and how to switch from Kerberos authentication back to NTLM authentication

2. Exclude the following folders (directories) that Microsoft Exchange Server 2003 uses:
   • Public
   • Exchange
   • Exadmin
   • OMA
   • Microsoft-Server-ActiveSync
   • ExchWeb
   To do so, follow these steps:
   1. On the server that is running Exchange Server 2003 and Windows SharePoint Services, click Start, click Administrative Tools, and then click SharePoint Central Administration.
   2. In the Virtual Server Configuration area, click Configure virtual server settings.
   3. On the Virtual Server List tab, click the virtual server that you have to add the excluded paths to.
   4. Under Virtual Server Management, click Define Managed Paths.
   5. In the Add a New Path section, type the path to exclude in the Path box.
   6. Click Excluded Path, and then click OK.
   7. Repeat steps 4 through 6 for each folder that you want to exclude.

If you must use Outlook Mobile Access with Microsoft Windows SharePoint Services, you must complete an extra step, in addition to not including the OMA path, to make this virtual directory accessible. Open the OMA Web.config file located at the following pathand add the following directives in the Web.config between <system.web></system.web>. Add these directives immediately after <system.web> to keep it as simple as possible:

<!-- 
        Clear out the WSS ASP.Net handler and specify the default ASP.Net handler for all pages 
    -->

 

    <httpHandlers>
        <clear />
        <add verb="*" path="*.aspx" type="System.Web.UI.PageHandlerFactory" />
    </httpHandlers>

 

    <!-- 

        Set the trust back to Full.  WSS configures a very restrictive trust policy that does not allow OMA to run correctly.

    -->

 

    <trust level="Full" originUrl="" />

 

 

    <!-- 

        Enable the session module.  This can also be enabled on the WSS Web.config, but is not enabled by default.
   
        If you receive the following message:

 

        Parser Error Message: The module 'Session' is already in the application and cannot be added again

 

        You can remove the following <httpModules></httpModules> section as session is already enabled on the virtual server 

    --> 

 

    <httpModules>
        <add name="Session" type="System.Web.SessionState.SessionStateModule"/>
    </httpModules>

 <!-- Enable Session for the pages in the OMA application --> 
<pages enableSessionState="true" enableViewState="true" enableViewStateMac="true" validateRequest="false" />

After you add the directives to the Web.config, save the file.