You have an Exchange Server 2010 organization. 
All users on the network connect to their mailboxes by using Microsoft Office Outlook. Your companys compliance policy states that：
.A copy of e-mail messages sent to the human resources department from the Internet must be archived.All archived e-mail messages must be stored on a third-party archival server 
You need to recommend a solution that meets the requirements of the compliance policy. 
What should you include in the solution？（）