Mastering Windows Group Policy

Remove this item when it is no longer applied

As we have already discussed, often preferences will leave themselves in place after a computer or user falls out of scope of receiving that preference setting. For example, if someone changes OUs and therefore no longer receives a GPO that they used to, and that GPO setting contained some preferences, typically those preferences stick around on the machine to which they were applied because Group Policy does not actively remove them. However, checking this box inside the Common tab forces Group Policy to do just that – when the machine moves out of scope, it will remove this preference setting when it is no longer applicable. Usually this is exactly the behavior you are looking for when you check ...