How to set Join Before Host Setting

Initially, do the following (this is a one-time setting),

1. Go to settings and search for Allow participants to join before host in the search box.
2. Turn on the settling.
3. Check theParticipants can join check box.
4. Set the desired time by selecting it from the dropdown. It's recommended to keep the time either 5 minutes before start time or 10 minutes before start time. Do not set it toanytime.

Check the settings below every time you schedule a meeting.

1. Scroll down until you find Options
2. Click Show 
3. See if the Allow participants to join check box is checked. If not, check it.
4. Adjust the time if needed.