IE7 – Cannot add sites to Trusted Sites after GPO applied

Hi,

Has anyone encounter this problem with IE7?

I have created a GPO to add a few sites into IE7 Internet Options/Security/Trusted Sites/Sites. The path in the GPO as follows: Computer Config/administrative templates/Windows Components/Internet Explorer/Internet Control Panel/Security Page/Site to Zone assignment list

After applying this GPO to a test OU which has a test PC, the sites defined by the GPO appeared under Internet Options/Security/Trusted Sites/Sites in the test PC after reboot. However, I discovered that sites cannot be manually added in as the buttons have been greyed out.

There are no other top-level GPOs to be inherited by the test PC.

Any idea if its an IE7 bug or user bug? 🙂