单项选择题
A.Instruct all users to import the 3d-party root CA certification
B.Configure CAS server to use a certificate issued by a third-party CA
C.Instruct all users to import an internal root CA certificate
D.Deploy Outlook Web Access with the S/MIME control to the client system
单项选择题 You have an Exchange organization that contains Exchange 2000 Server and Exchange Server 2003 Service Pack 2 （SP2） servers. You plan to transition the organization to Exchange Server 2010. You need to prepare the Exchange organization for the deployment of Exchange Server 2010 Mailbox， Client Access， and Hub Transport servers. What should you do first（）？
单项选择题 YourorganizationhasExchangeServer2010.Youneedtoensurethatusersintheorganizationarenotifiedbeforetheysende-mailmessagestoexternalrecipients.Whichcmdletshouldyourun？（）
单项选择题 You have an Active Directory forest that contains one domain named contoso.com. The functional level of both the forest and the domain is Windows Server 2003. You have an Exchange Server 2003 organization. All servers have Exchange Server 2003 Service Pack 2 （SP2） installed. You plan to transition to Exchange Server 2010. You need to prepare the Active Directory environment for the deployment of the first Exchange Server 2010 server. What should you run（）？