单项选择题You work as the enterprise exchange administrator at Xxx .The Xxx network consists of a domain named xxx .Xxx is using Microsoft Exchange Server 2010.The Xxx network contains a server named XXX-EX10 configured with the following roles. (1)Client Access Role (2)Hub Transport Role (3)Mailbox Server Roles What action must you take to guarantee e-mail availability to Xxx users who are are utilizing regular mail clients like Microsoft Outlook Express or Windows Live Mail?()
A.You should use Security/Multipurpose Internet Mail Extensions (S/MIME).
B.You should use the Windows Management Instrumentation Command-line (WMIC).
C.You should use the Automatic setting of the Microsoft Exchange POP3 service.
D.You should use the setup /NewProvisionedServer.