You are a messaging professional. Your company has a Microsoft Exchange Server 2003 organization that includes Exchange Server 2007 computers, Client Access Servers, and Hub Transport servers.

The company hosts user mailboxes on Exchange Server 2003 back-end servers. The company decommissions all Exchange Server 2003 front-end servers.

The company wants to add the most secure POP3 access for employees who access their mailboxes from home.

The company has the following requirements:

POP3 traffic that traverses the Internet must be as secure as possible.
Traffic between the Exchange Server 2003 back-end servers and the computers that support POP3 access must be secure as possible.

You need to meet the outlined requirements.

Which two actions should you perform? (Each correct answer presents part of the solution Choose two.)

A.
Configure SSL connectivity between the POP3 client computer and the Client Access Server by using TCP
port 995. Use TLS authentication.

B.
Configure SSL connectivity between the Client Access Server and the Exchange Server 2003 computer. Use
TLS authentication.

C.
Configure POP3 connectivity between the POP3 client computer and the Client Access Server by using
TCP port 110. Use Integrated authentication. Encrypt the communication channel by using IPSec.

D.
Configure POP3 connectivity between the Client Access Server and the Exchange Server 2003 computer on
TCP port 110. Use Basic authentication. Encrypt the communication channel by using IPSec.