Correct Answer:
Explanation/Reference:
Explanation:
Step 1: Terminating a Partially Failed Datacenter
When the DAG is in DAC mode, the specific actions to terminate any surviving DAG members in the primary datacenter are as follows:
The DAG members in the primary datacenter must be marked as stopped in the primary datacenter. Stopped is a state of Active Manager that prevents databases from mounting, and Active Manager on each server in the failed datacenter is put into this state by using the Stop-DatabaseAvailabilityGroup cmdlet.
Step 2-4: Activating Mailbox Servers
The steps needed to activate Mailbox servers during a datacenter switchover also depend on whether the DAG is in DAC mode. Before activating the DAG members in the second datacenter, we recommend that you validate that the infrastructure services in the second datacenter are ready for messaging service activation.
When the DAG is in DAC mode, the steps to complete activation of the mailbox servers in the second datacenter are as follows:
1. (step 2, step 3) The Cluster service must be stopped on each DAG member in the second datacenter. You can use the Stop-Service cmdlet to stop the service (for example, Stop-Service ClusSvc), or use net stop clussvc from an elevated command prompt.
2. (step 4) The Mailbox servers in the standby datacenter are then activated by using the Restore-DatabaseAvailabilityGroup cmdlet. The Active Directory site of the standby datacenter is passed to the Restore-DatabaseAvailabilityGroup cmdlet to identify which servers to use to restore service and to configure the DAG to use an alternate witness server.
Reference: Datacenter Switchovers
https://technet.microsoft.com/en-us/library/dd351049(v=exchg.150).aspx
