This may sound dumb so please humor me, I am new to exchange.
What traffice does and exchange edge server handle? Is it only designed to handle email relaying between my hub server and external mail servers? or does it also handle client connection from outside my network as well? (such as mobile devices and outlook)
If it doesn't handle the client traffic (which is what I suspect) how do I safely route client traffic to my interal client access server without exposing it and my network to the outside world?