This should help: https://help.webex.com/en-us/article/nsq9s2h/Move-participants-to-and-from-the-lobby-in-Webex-Meetings 

You can reuse the password. Refer to the statement in document: https://help.webex.com/en-us/article/5tsd9q/Password-Management-in-Control-Hub Things will change if a user is a AD user. You will find "Smart lockout" in "Organization Settings in contr...