You have an Exchange Server 2010 that contains a DAG named DAG1.Contains 3 Mailbox Servers including a server named Server 1. Server 1 fails.You restore Server 1.You need to ensure that Server 1 can replicate Mailbox Databases from DAG1. What should you do first？（）

• A、Modify the GUID for Server 1
• B、Remove the object for Server 1 from DAG1
• C、Remove the default Mailbox Database from Server 1
• D、Disable log truncation for the Mailbox database in DAG1