Hotspot Question
You have an Exchange Server 2016 organization. All users use Microsoft Outlook 2016. You need
to configure the Exchange Server organization to meet following requirements:
– Users must be prevented from receiving a notification when they attempt
to send an email message to distribution groups that contain less than
100 members.
– Users must be notified before they send email messages to an unmonitored
mailbox named Service1.
Which cmdlet should you run to meet each requirement? To answer, drag appropriate cmdlets to
the correct requirements. Each cmdlet must be used once, more than once, or not at all. You may
need to drag the split bar between panes or scroll to view content.
Answer: 
Set-OrganizationConfig
Set-Mailbox
Set-OrganizationConfig
I am unable to confirm if this is actually correct.
Set-Mailbox
“mailtip”
https://technet.microsoft.com/en-us/library/bb123981(v=exchg.160).aspx
Set-OrganizationConfig -MailTipsLargeAudienceThreshold 100