FAQ: I am an admin and removed a user, but they are still able to sign back in?

Answer: Most likely this is a setting for your team, where anyone with your domain is allowed to sign up: deleting their account then wouldn’t disable their ability to sign up for a new account. If you’d like to change this setting for your team, navigate to your admin dashboard and click “Team Settings”. In here, you should see a toggle button for “Member Access”. If the text underneath the button reads “ALLOW ANY VALID TEAM EMAIL”, then click the toggle button, and the text should now read “MEMBER ACCOUNTS ONLY”.