You have an Exchange Server 2010 organization. 
Company policy states that a copy of a users mailbox must be kept for one year after the user leaves thecompany. 
All user accounts are in an organizational unit （OU） named OU1. 
A compliance administrator plans to export the mailboxes to personal folders. 
You need to recommend a solution that allows the compliance administrator to meet the requirements ofthe company policy. 
What should you include in the solution？（）

Your network contains two Exchange Server 2010 Edge Transport servers. 
The network also contains five Hub Transport servers in two Active Directory sites. All e-mail sent to the network is received by the Edge Transport servers. You plan to configure anti-spam filtering. 
You need to ensure that the anti-spam filtering configurations are applied to both Edge Transport servers. The solution must use a minimum amount of administrative effort. 
What should you do？（）