I'm travelling from Canada to Russia, connecting in Paris CDG airport. The inbound and outbound flights are both in terminal 2 (2C and 2E) same airline (air france).
Looking at the this:
It seems I need to take the bus and I see a "Police" section after that.
I'm not entering the Schengen area. Do I need to pass through immigration and have a visa? Or do the buses operate within the transit area?