You have an Exchange Server 2010 organization that contains a single Mailbox server.The Mailbox server contains two mailbox databases named DB1 and DB2.You need to restore a backup of DB1.Users must be able to connect to their mailboxes on DB1 during the restore process.What should you create first?()
A. a database availability group (DAG)
B. a Client Access server array
C. a Recovery Mailbox database
D. a recovery storage grou
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C. 借比喻抒情
D. 借举止抒情