You have an Exchange Server 2010 SP1 organization named contoso.com.

You need to ensure that all of the email messages sent between the Exchange mailboxes are Information Rights Management (IRM)-protected automatically.

What should you do?

A.
Create a journal rule.

B.
Create a transport rule.

C.
Run the Set-TransportConfig cmdlet.

D.
Run the Set-IRMConfiguration cmdlet.

E.
Install Active Directory Federation Services (AD FS).

F.
Install Active Directory Certificate Services (AD CS).

G.
Install Active Directory Right Managment Services (AD RMS).

H.
Configure Transport Layer Security (TLS) on all Send connectors.

Explanation:
1. Install Active Directory Right Managment Services (AD RMS).
2. Run the Set-IRMConfiguration cmdlet.
3. Create a transport rule.

Reference:

http://technet.microsoft.com/en-us/library/dd876938.aspx