A corporate environment includes Exchange Server 2010 SP1. The Exchange Server environment
includes two Client Access servers, two Hub Transport servers, and two Mailbox servers on the
internal network, and two Edge Transport servers in a perimeter network. An edge subscription is in
place between the Hub Transport servers and the Edge Transport servers. When an Edge Transport
server fails, messages accepted by that server are not delivered. You need to recommend a solution
for ensuring that messages accepted by either Edge Transport server are attempted for delivery if
either Edge Transport server fails. What should you recommend?

A.
Enable shadow redundancy.

B.
Create a new remote domain.

C.
Create a new send connector.

D.
Enable back pressure.

Explanation: