单项选择题
A.From the Exchange Management Shell， run Clean-MailboxDatabase -Identity DB1.
B.From the Exchange Management Shell， run Remove-MailboxDatabase -Identity DB1\Server1.
C.From the Exchange Management Console （EMC）， right-click the database copy and select Remove.
D.From the Exchange Management Console （EMC）， right-click DAG1 and select Manage Database Availability Group Membership.Remove Server1 from the list and click Manage.
单项选择题 YouhaveanExchangeServer2010organization.TheorganizationcontainstwoMailboxserversnamedServer1andServer2.Bothserversaremembersofadatabaseavailabilitygroup（DAG）.AmailboxdatabasenamedDB1hasacopyonServer1andServer2.YouneedtoensurethatServer2waitsthreedaysbeforeapplyingtransactionlogfilesfromServer1toDB1.Whatshouldyourun？（）
单项选择题 Your Exchange Server 2010 organization contains the servers shown in the following table. Server1 and Server2 are members of a database availability group （DAG）.You shut down Server1.Some users report that they cannot access their mailboxes.You need to ensure that all users can connect to their mailboxes if a single Mailbox server becomes unavailable.What should you do？（）
单项选择题 YouhaveanExchangeServer2010organizationthatcontainsadatabaseavailabilitygroup（DAG）namedDAG1.DAG1containstwoMailboxserversnamedServer1andServer2.YouneedtochangetheTCPportthatServer1andServer2usetosendtransactionlogfiles.Whatshouldyoudo？（）