You need to ensure that users are informed when Exchange Online Protection quarantines email message

You manage an Office 365 tenant that uses an Enterprise E1 subscription.
You need to ensure that users are informed when Exchange Online Protection quarantines email
messages.

A.
Enable-JournalRule

B.
New-RetentionPolicyTag

C.
Start-ManagedFolderAssistant

D.
Set-CsUser

E.
Set-CsPrivacyConfiguration

F.
Set-HostedContentFilterPolicy

G.
Set-MalwareFilterPolicy

H.
Set-MailboxJunkEmailConfiguration

Explanation:
Use the Set-MalwareFilterPolicy cmdlet to modify malware filter policies in your organization.
Example 1
This example modifies the malware filter policy named Contoso Malware Filter Policy with the
following settings:
Delete messages that contain malware.
Don’t notify the message sender when malware is detected in the message.
Notify the administrator admin@contoso.com when malware is detected in a message from an
internal sender.
Set-MalwareFilterPolicy -Identity “Contoso Malware Filter Policy” -Action DeleteMessage –
EnableInternalSenderAdminNotifications $true -InternalSenderAdminAddress admin@contoso.com

Set-MalwareFilterPolicy
https://technet.microsoft.com/en-us/library/jj215689(v=exchg.150).aspx