You have an Exchange Server 2013 organization.
Your company identifies the following security requirements:
USERS MUST BE ABLE TO SEND ENCRYPTED EMAIL MESSAGES
THAT CAN ONLY BE DECRYPTED BY THE INTENDED RECIPIENT.
ALL EMAIL MESSAGES SENT BY A USER NAMED USER1
TO AN EXTERNAL RECIPIENT MUST BE PROTECTED BY USINGTLS.
ALL SMTP SESSIONS TO A REMOTE SMTP HOST
NAMED SMTP1 MUST BE ENCRYPTED.
You need to recommend which technology must be usedto meet each requirement.
Which technologies should you recommend? 
Answer: 
Explanation: