You configure Outlook Web App （OWA） to require SSL.A user named User1 reports that when she connects to OWA， she receives a Web site security certificate warning message.You need to prevent User1 from receiving the warning message when she connects to OWA. What should you do？（）

• 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）.