We have 200+ internal employees in RingCentral. It would be useful to have mass add functionality in the GUI for Teams/Calendars so Team admins don't have to find every single person individually.
Maybe include some sorting features to narrow the list down by Site or by other parameters such as MVP accounts over/instead of guests? Checkboxes and Add All button sure would be nice here.
The best solution we have at present is to divide up staff lists and distribute the workload of adding staff.