Which type of DNS record for the Autodiscover service is required?

You are an IT assistant for a local real estate company. The company is configuring Microsoft Office
365 for email services.
You want to enable Microsoft Outlook clients to easily connect to Microsoft Exchange Online
services.
Which type of DNS record for the Autodiscover service is required?

A.
CNAME

B.
SRV

C.
MX

D.
HOST

Explanation:
The CNAME record helps Outlook clients to easily connect to the Exchange Online service by using
the Autodiscover service. Autodiscover automatically finds the correct Exchange Server host and
configures Outlook for users.
External DNS records required for Exchange Online
http://howtonetworking.com/msapps/office365-11.htm