An organization has Exchange server 2010. Network contains internal root Certification
Authorization (CA).
Users on network use Outlook Anywhere. A CAS server uses a wildcard certificate issued by
a trusted third party root CA
You need to ensure that users can send and receive encrypted e-mail messages by using
S/MIME.
A.
Instruct all users to import the 3d-party root CA certification
B.
Configure CAS server to use a certificate issued by a third-party CA
C.
Instruct all users to import an internal root CA certificate
D.
Deploy Outlook Web Access with the S/MIME control to the client system