No- an account can only be used in one meeting/webinar at a time. If you
try it will tell you you are presently in a meeting/webinar and would
you like to leave the one you are in and attend the other one.
Looks like it is down to putting both machines side by side and
comparing settings line by line.. I HATE when that has to be done, but
sometimes it is the only way... particularly with something like Zoom
that can have over 170 settings!
be sure to check all meeting and account settings to be sure you have
turned on the feature to allow you to use virtual