I have set "Remove computers not found in Active Directory from all tables" but they don't actually get removed from LS. I'm running the latest version.
Please contact us at support@lansweeper.com and provide us with your Errorlog.txt, which can be found in Program Files\Lansweeper\Service on your Lansweeper server. For easy reference, also include a link to this forum thread in your email.
Please note that cleanup actions are performed when the Lansweeper service is started and subsequently every 24 hours. If you immediately wish to apply the setting changes you've made, restart your Lansweeper service.