Comentário oficial
This is covered in a few places but hasn't really been tested well with the M300. You need to get everything cleared on the DJI FlySafe site. Then you need to log in to your DJI account using the DJI app to sync all of your new authorizations to your aircraft. You can see them all in the DJI app. If you get an authorization from anywhere other that DJI it doesn't matter as far as the aircraft is concerned. Once you have ALL of the overlapping airspaces cleared the aircraft MIGHT allow you to takeoff. Manual flight has less restrictions than waypoint flight.