Error 403.7 or "Connection to Server Could Not Be Established" (190004)

We strongly recommend that all users upgrade to Microsoft Internet Information Services (IIS) version 6.0 running on Microsoft Windows Server 2003. IIS 6.0 significantly increases Web infrastructure security. For more information about IIS security-related topics, visit the following Microsoft Web site:

http://www.microsoft.com/technet/security/prodtech/IIS.mspx

SYMPTOMS

One of the following errors occurs when trying to browse a Web site that has Secure Sockets Layer (SSL) enabled:

HTTP Error 403
403.7 Forbidden: Client certificate required

This error occurs when the resource you are attempting to access requires your browser to have a client Secure Sockets Layer (SSL) certificate that the server recognizes. This is used for authenticating you as a valid user of the resource.

Please contact the Web server's administrator to obtain a valid client certificate.

-or-
Connection to the server could not be established.

CAUSE

The Internet Explorer client certificate and the Internet Information Server (IIS) client certificate need to be synchronized.

WORKAROUND

To work around this problem, run the following three commands from a command prompt in the <%SystemRoot%>\System32\Inetsrv directory:

   IISCA
   Net Stop IISAdmin /y
   Net Start W3SVC