Can I use Join Before Host?

Please note the following if you intend to use Join Before Host.

1. If Waiting Room is turned ON in your meeting settings, Join Before Host will not work for your meetings.
   https://support.zoom.us/hc/en-us/articles/115000332726-Waiting-Room
   
   
2. Zoom allows each account to host and launch only ONE session at a time.
   If someone joins into a room scheduled tomorrow and you are trying to launch a session happening now, you will not be able to launch the session and will get a warning message there is another meeting in progress. You will be prompted to close either one of the meeting.
   
   
3. If you enable Automatically Start Recording to the cloud, it will start the recording to your cloud account as soon as someone joins the meeting.