Use this dialog box to enable Web service extensions for your applications. If an application has suddenly stopped working, use this dialog box to confirm and enable all Web service extensions for that application.
Click the name of the application from the list box.
Extensions to be allowed
This lists all of the required Web service extensions for the currently selected application.
Click OK to enable the list of allowed Web service extensions for the currently selected application.
To learn more about Web service extensions and configuring applications, see the IIS 6.0 online documentation on the Microsoft Windows Server TechCenter.