单项选择题
A.From the Exchange Management Console （EMC）， modify the properties of the mailbox database
B.From the Exchange Management Console （EMC）， modify the properties of the Mailbox server object
C.From the Exchange Management Shell， create a management role and then assign the role to all users
D.From the Exchange Management Shell， create a retention policy and then assign the policy to all users
单项选择题 YouhaveanExchangeServer2010organizationthatcontainsamailboxdatabasenamedDB1.YouhaveabackupofDB1.Youneedtocopyamailboxfromthebackuptoapersonalfolder（PST）file.ThesolutionmustnotpreventusersonDB1fromaccessingtheirmailboxes.Whatshouldyoudo？（）
单项选择题 YouhaveanExchangeServer2010organizationthatcontainsasingleMailboxserver.TheMailboxservercontainstwomailboxdatabasesnamedDB1andDB2.YouneedtorestoreabackupofDB1.UsersmustbeabletoconnecttotheirmailboxesonDB1duringtherestoreprocess.Whatshouldyoucreatefirst？（）
单项选择题 YournetworkcontainsanExchangeServer2010Mailboxserver.Theserverhasonemailboxdatabase.AusernamedUser1reportsthathehasmultiplecorruptede-mailmessagesinhismailbox.YouneedtorecoverUser1¯s-mailmessages.Thesolutionmustnotdeleteanyothere-mailmessagesinthemailboxdatabase.Whatshouldyoudo？（）