Article ID: 248075
When connecting to Internet Information Services using a browser, you may receive the following error:
HTTP 403.12 - Access Forbidden: Mapper denied access
The page requires a valid client certificate
The page you are trying to view requires the use of a valid client certificate. Your client certificate map has been denied access to this Web site.
Generic 403 errors are returned when access to the content has been forbidden. The server is refusing to fulfill the request for content. This is generally not related to permissions.
Error 403.12 states that access to the content is not available and that the server requires a valid client certificate that has not been denied access.
The User ID mapped to the client certificate has been denied access to the resource.
To resolve this problem:
For additional information on requesting a new certificate, click the article number below to view the article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/186812/EN-US/ )Error: 403.7 Forbidden: Client Certificate Required
Article ID: 248075 - Last Review: June 19, 2014 - Revision: 2.0
Retired KB Content Disclaimer
This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.