This article describes how to force proxy settings via group policy.
- Click Start – All programs – Administrative Tools – Group Policy Management.
- Create or Edit Group Policy Objects.
- Expand User configuration – Policies – Windows Settings – Internet Explorer Maintenance – Connection.
- In right Pane Proxy Settings.
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:
- Click Start – All programs – Administrative Tools – Group Policy Management.
- Create or Edit Group Policy Objects.
- Expand Computer Configuration – Administrative Templates – Windows Components - Internet Explorer – Internet Control Panel
- In right Pane Disable the Connections page (Enabled)