Block web page elements that aren't from the domain that's in the address bar from setting cookies.
If you enable this policy, web page elements that are not from the domain that is in the address bar can't set cookies
If you disable this policy, web page elements from domains other than in the address bar can set cookies.
If you don't configure this policy, third-party cookies are enabled but users can change this setting.
|Registry Hive||HKEY_LOCAL_MACHINE or HKEY_CURRENT_USER|