Recently we needed to add an address in the

“Do not use proxy server for addresses beginning with”

Setting’s in internet explorer. The box was greyed out via group policy , however this was just for a single user using a a remote citrix enviroment and didn’t have the time to roll it out through Group Policy.

Windows stores the entry in the following location :

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings]

“ProxyOverride”=

So open up regedit and modify the enteries via this key!