The requested page requires a valid SSL client certificate

The account to which your client certificate is mapped on the Web server has been denied access to this Web site. A Secure Sockets Layer (SSL) client certificate is used for identifying you as a valid user of the resource.

Please try the following:

Contact the Web site administrator to establish client certificate permissions.

If you already have a valid client certificate, use your Web browser's security features to ensure that your client certificate is installed properly. (Some Web browsers refer to client certificates as browser or personal certificates.)

Change your client certificate and click the Refresh button, if appropriate.

HTTP Error 403.12 - Forbidden: Client certificate is denied access by the server certificate mapper.
Internet Information Services (IIS)

Technical Information (for support personnel)

Go to Microsoft Product Support Services and perform a title search for the words HTTP and 403.

Open IIS Help, which is accessible in IIS Manager (inetmgr), and search for topics titled Using Certificate Trust Lists, Client Certificate Mapping, and About Custom Error Messages.