You have an Exchange Server 2016 organization. The organization contains 5,000 mailboxes.
All of the users in the organization share their Calendar with the users in two domains named contoso.com
andfabrikam.com.
You need to prevent the organization users from sharing their Calendar with the users in the contoso.com
domain.
What command should you run? To answer, select the appropriate options in the answer area.
Hot Area:
Answer: 
The Domains parameter specifies the domains to which this sharing policy applies and the sharing policy actions. Values for this parameter take the format: ‘Domain: SharingPolicyAction’.
The following sharing policy action values can be used:
CalendarSharingFreeBusySimple Share free/busy hours only
CalendarSharingFreeBusyDetail Share free/busy hours, subject, and location
CalendarSharingFreeBusyReviewer Share free/busy hours, subject, location, and the body of the message or calendar item
ContactsSharing Share contacts only
So the right one should be the first answer:
-domains contoso.com: CalendarSharingFreeBusySimple – as the requirement is to affect the CONTOSO.COM domain.
Yet I’m confused, because for this command will still share some simple information with them and not prevent it entirely.
When you run this command, it overwrites all previous domains.
So the given answer is correct as you do NOT want contoso.com to be in their any more (only fabrikam)