Okay, I seriously thought I already have this post uploaded in this blog, but it turned out I was wrong. I have kept this for a long time, and it helped me a numbers of times already so I reckon it will help others as well. IE Connections. There are a few settings we can configured in IE Connections Settings such as : Automatically detect settings  Use automatic configuration script  Use a proxy server  Bypass proxy server for local addresses  Use different proxy servers for different protocols  Proxy server exception.  For this post, I will list registry keys positions for each setting. Objective : Grey-Out / Not-Grey-Out Automatic Configuration Location : Hive : HKCU Key : Software\Policies\Microsoft\Internet Explorer\Control Panel\ Value Name : AutoConfig Value Type : DWORD Value Data : 0 Result : Not-Greyed-Out, settings for Automatically detect settings & Use automatic configuration script can be changed. Value Data : 1 Result : Greyed-Out, settings f