Prevent managing pop-up exception list

You can allow pop-ups from specific websites by adding the sites to the exception list. If you enable this policy setting, the user cannot add websites to or remove websites from the exception list. If you disable or do not configure this policy setting, the user can add websites to or remove websites from the exception list. Note: You can allow a default list of sites that can open pop-up windows regardless of the Internet Explorer process's Pop-Up Blocker settings by enabling the "Specify pop-up allow list" policy setting.