A corporate environment includes Exchange Server 2010 and Active Directory Domain Services (AD DS). Client computers run Windows 7 and Microsoft Outlook 2010. A transport rule is configured to apply a disclaimer to all outbound email messages. The transport rule is not applying the disclaimer to encrypted email messages. You need to recommend a solution that allows the existing transport rule to apply the disclaimer to encrypted email messages.
What should you recommend?
A.
message classification
B.
Mutual Transport Layer Security (MTLS)
C.
Secure/Multipurpose Internet Mail Extensions (S/MIME)
D.
Active Directory Rights Management Services (AD RMS)