Following up on this thread, I've verified that the Clean Up button as well as Clean Up Automatically option will only affect folders which the user has expanded.
It doesn't actually "clean up" folders that have not been enumerated (clicked on, expanded, etc) yet.
If Clean Up Automatically is in-force, any folders that are clicked and expanded will be cleaned automatically, while the manual Clean Up button will require users to click on it in order to clear out folders that are no longer there.
It doesn't actually "clean up" folders that have not been enumerated (clicked on, expanded, etc) yet.
If Clean Up Automatically is in-force, any folders that are clicked and expanded will be cleaned automatically, while the manual Clean Up button will require users to click on it in order to clear out folders that are no longer there.