This article describes how to force proxy settings via Group Policy.
For some security reasons maybe administrator need to prevent end users from change their proxy settings.
You can do it with group policy follow this steps:
This article was originally posted at http://mabdelhamid.wordpress.com/2011/10/20/how-to-force-proxy-settings-via-group-policy/
Nice article. It has been referred
Excellent Document - Was good to reference to a fellow user on Technet Forum!