Spærre internet indstillinger i en GPO

Du finder den her
UserConfiguration/Administrative Templates/Windows Components/Internet Explorer

Du får også lige Microsoft's forklaring

Prevents users from changing proxy settings.

If you enable this policy, the proxy settings appear dimmed. These settings are in the Proxy Server area of the Local Area Network (LAN) Settings dialog box, which appears when the user clicks the Connections tab and then clicks the LAN Settings button in the Internet Options dialog box.

If you set the "Disable the Connections page" policy (located in \User Configuration\Administrative Templates\Windows Components\Internet Explorer\Internet Control Panel), you do not need to set this policy, because the "Disable the Connections page" policy removes the Connections tab from the interface.

Jeg takker og bukker... den setting har jeg sgu ledt længe efter :)