单项选择题
A.Enable Domain Security Authorization
B.Enable Exchange Server Authorization
C.Enable Externally Secured Authorization
D.Disable anonymous users permission group
单项选择题 AnorganizationhasExchangeserver2010.NetworkcontainsinternalrootCertificationAuthorization（CA）.UsersonnetworkuseOutlookAnywhere.ACASserverusesawildcardcertificateissuedbyatrustedthirdpartyrootCA.Youneedtoensurethatuserscansendandreceiveencryptede-mailmessagesbyusingS/MIME.Whatshouldyoudo？（）
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？（）