United States, Europe, Asia and Africa all need to contact with each other to solve their problems. So it is imperative that you have your own schedule about when to communicate with others via online meetings. It is good to send pre-written emails to your team/group to gently remind them about upcoming virtual meetings via the certain technology.
It would be a good idea to bring all of the people involved in a certain place to hold views and conversations. But virtual meetings are much better to hold reducing the cost of expenditure for stay in hotels and flights and therefore, saving time and energy.