KBA-01033: Why am I getting a (407) Proxy Authentication Required error?

Problem:

When I try to launch Spitfire I‘m getting a System.Net.WebException: The remote server returned an error:(407) Proxy Authentication Required error message.

Solution:

Add your Spitfire web application as an Exception for your Proxy Server.

1. In Internet Explorer, select Tools > Internet Options.
2. On the Connections tab in the Proxy server section, click the Advanced button.
3. In the Exceptions area, add the beginning of the URL for your Spitfire application.
4. Click OK three times to save your entry and close Internet Options.

KBA-01033; Last updated: October 13, 2016 at 7:31 am;