You plan to deploy an Exchange Server 2013 organization.
You need to recommend a solution to ensure that a user named User1 can access email messages by
using Exchange ActiveSync on an Android device.
The solution must prevent all other users from using Android devices to access email by using
Exchange ActiveSync.
What should you recommend doing first?

A.
Run the Set-CasMailbox cmdlet.

B.
Create a device access rule.

C.
Modify the Quarantine Notification settings.

D.
Create a mobile device mailbox policy.