Smart Connect 2.0 experiencing issues authenticating on Microsoft Edge/IE 11 when using CSP on-lan in upstream mode on Windows 10.
Localhost restrictions on Microsoft Edge
https://blogs.msdn.microsoft.com/msgulfcommunity/2015/07/01/how-to-debug-localhost-on-microsoft-edge/
In order to prevent authentication issues on Windows 10 while using smart connect 2.0 in upstream mode to a locally hosted client site proxy server, please use "127.0.0.1" instead of "localhost" as the loopback address. We have observed that when using "localhost' Microsoft Edge runs into authentication issues.