Proxy authentication required

You must be authenticated by a proxy server before the Web server can execute your request.

Please try the following:

  • Log on to your proxy server and try again.
  • Contact the proxy server administrator if you believe you should be able to view this directory or page.

HTTP Error 407 - Initial proxy authentication required by the Web server.
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 407.
  • Open IIS Help, which is accessible in IIS Manager (inetmgr), and search for topics titled Authentication, About WebDAV, and About Custom Error Messages.