How to Disable Changing Automatic Configuration Settings internet explorer via gpo
Prevents users from changing auto-configuration settings. If you enable this policy, the auto-configuration settings appear dimmed. The settings are located in the Automatic Configuration area of the Local Area Network (LAN) Settings dialog box. To see the Local Area Network (LAN) Settings dialog box, open the Internet Options dialog box, click the Connections tab, and then click the LAN Settings button.