1. Go course, click "Create from standalone(admin only)" 
  2. Select the standalone of trainer's local connection.Differ from Fresh-start desktop.
  3. Then Fresh-start can be cloned to all delegates with their local connection. (eg: delegates with US connection)
  4. Trainer's desktop(Cloned from standalone) can have local connection as well. (eg: trainer with UK connection)

With the separate desktop connection, delay of cross-boarder training is small. Make sure course desktops smooth during training.