单项选择题YouworkastheenterpriseexchangeadministratoratXxx.TheXxxnetworkconsistsofadomainnamedxxx.XxxhasthreeExchangeServer2007mailserversnamedXXX-EX01,XXX-EX02andXXX-EX03thathasthefollowingimplementation:records.WhatactionmustyoutaketomakesureoftheavailabilityofthemailboxesonXXX-EX03iftheemployeesutilizetheExchangeActiveSyncaftertheinstrallationofXXX-EX04?()
A.You should use Basic authentication on Exchange ActiveSync and set up only Basic authentication on the RPC virtual directory.
B.You should use NTLM authentication on the RPC virtual directory.
C.You should use Microsoft Challenge Handshake Authentication Protocol version 2 (MS-CHAP v2) on XXX-EX01.
D.You should use the anonymous setting in the authentication type for the Microsoft-Server-ActiveSync virtual directory on XXX-EX01.