单项选择题

A.On User1’s computer, install the erver’s root certificate into the Trusted Root CertificatioAuthorities store.
B.On the Client Access server, install the server’s root certificate into the Trusted RooCertification Authorities store.
C.From the Exchange Management Console (EMC), assign an Outlook Web App mailbox policy to User1.
D.From the Exchange Management Console (EMC), open owa (Default Web Site) Properties. Configure the logon format to use the user principal name (UPN).