You going to have to be able to ping from the outside to inside again, how is the data supposed to know how to get back?
Do the following tests..
Telnet to the remote server across the firewall from the backup server on port 10,000 - do you get a ...
Yes, you will need the Exchange agent for BE if you are planning on using that.
There is a SBS version of BE available. This version includes the Exchange agent. If you already have BE, acquiring the SBS version might be less expensive than acquir...