You have a hosted Exchange organization. All servers in the organization have Exchange
Server 2010 Service Pack 1 (SP1) installed.
You need to prevent a user named User1 from using Outlook Web App (OWA) to access his
mailbox.
What should you do?

A.
Create a new OWA mailbox policy.

B.
From the properties of Users1’s Mailbox, modify the mailbox settings.

C.
From the properties of User1’s mailbox, modify the mailbox features.

D.
Modify the default OWA mailbox policy.

Explanation: