You work as the enterprise exchange administrator at Xxx .Xxx is using Microsoft Exchange Server 2010 as their messaging solution.What actions must you take to allow employees to change their passwords by utilizing Microsoft Windows but not Outlook Web App？（）

A.You must set up a Group Policy Object.
B.You must set up an Outlook Web App Mailbox policy.
C.You must change the properties of the public folder database.
D.You must set up recipient filtering.

A.You must use IP Block list.
B.You must change the properties of the OWA virtual directory.
C.You must use an Outlook Web App Mailbox policy.
D.You must set up recipient filtering.

A.You must set up recipient filtering.
B.You must set up a Host （A）.
C.You must use a TXT record.
D.You must use a Pointer （PTR） record.
E.You must use a Mail exchange （MX） record.