Need the opportunity to unmute all participants on the meeting.
An Admin setting needs to be available so when a meeting is set up you can opt to un-mute all participants who join and give them the option of muting themselves. Also, the meeting owners need the ability to unmute participants.
Jed Boulton commented
meeting owners should be able to unmute participants
AND....when the person who uses the MUTE ALL function, has to know how to get themselves off of that mute also. It mutes the person who clicked on the function too. If you do not know *6, it leaves you hanging in your meeting.