Every
                                participant in a
                                meeting is
                                assigned a role as
                                a Presenter or Attendee.
                                A participant's
                                role controls what
                                they can do while
                                in a
                                meeting.  
The Organiser is
                                creator of the
                                meeting and cannot
                                be transferred to
                                another
                                participant.  
The Presenter and Attendee roles
                                are assigned by
                                the Organiser
                                either before the
                                meeting
                                in Meeting
                                    Options from
                                the invitation, or
                                during the meeting
                                in the
                                    Show
                                    participants tab
                                in the options of
                                each individual
                                participant. 
To read
                                more about roles
                                and permissions
                                and how to assign
                                them
                                see Quick
                                            Guide
                                            to
                                            Settings
                                            for
                                            Effective
                                            Meetings
                                            in
                                            Microsoft
                                            Teams:
                                            Teams
                                            Meeting
                                            options.