You have an Exchange Server 2016 organization and Microsoft Office 365 subscription configured in a hybrid
deployment.
You need to ensure that any email messages sent to the contoso.com domain are encrypted by using Office
365 Message Encryption.
Which three commands should you use? Each correct answer presents part of the solution.
A.
New-MessageClassification
B.
New-TransportRule
C.
Set-IRMConfiguration
D.
New-OutlookProtectionRule
E.
Import-RMSTrustedPublishingDomain
Explanation:
http://www.msexchange.org/articles-tutorials/office-365/exchange-online/office-365-message-encryptionpart1.html
https://technet.microsoft.com/en-us/library/dn569289.aspx