A user can only have two meetings active at a time, regardless of if they are actually present in the meetings or not. If you need more than two concurrent meetings to run you will need to use scheduling privileges.
You can assign users to schedule meetings on your behalf. You can also schedule meetings on behalf of someone that has assigned you scheduling privilege. This might be necessary for course officers who are scheduling teaching sessions on behalf of lecturers.
A user can only have two meetings active at a time, regardless of if they are actually present in the meetings or not. If you need more than two concurrent meetings to run you will need to use scheduling privileges.