HOTSPOT
A company uses Exchange Online. You plan to use the email domain contoso.com for all employees.
You must configure Exchange Online to support Outlook 2016 client connectivity.
You need to configure the appropriate DNS entries.
Which record should you create? To answer, select the appropriate entries from each list in the answer area.Hot Area:
Answer: 
Explanation:
Box 1: Autodiscover.contoso.com
You can define an alias in one domain to point to a target server in a completely different domain.
Box 2: CNAME
The cloud-based service uses a CNAME record to implement the Autodiscover service for Outlook clients.
Box 3: Autodiscover.outlook.com
The Autodiscover CNAME record must contain the following information:
Alias autodiscover
Target autodiscover.outlook.com
https://msdn.microsoft.com/en-us/library/cc950655(v=exchsrvcs.149).aspx