The Montreal Datacenter experiences a power failure.
You need to ensure that all the users can access their Mailbox.
Which three actionsshould you perform?
Answer: 
Explanation:
Box 1:
Box 2:
Box 3:
Note:
Example:
Imagine that an outage has occurred in Datacenter-Aand the decision to perform a datacenter switchover has
been made. Currently the two remaining Exchange servers are online in Datacenter-B and the cluster is in a
lost quorum state. Using the integrated commands the administrator starts the switchover process by running
stop-databaseavailabilitygroup for the DAG members in Datacenter-A, as illustrated below.
Box 1:
Stop-DatabaseAvailabilityGroup identity DAG activeDirectorySite:Datacenter-A -configurationOnly:$TRUE
The results of this command can be verified with Get-DatabaseAvailabilityGroup identity DAGNAME | fl
name,StartedMailboxServers,StoppedMailboxServers. As expected, Servers in Datacenter-Bremain on
the started servers list while servers in Datacenter-Aare on the stopped servers list.
The Administrator then stops the Cluster Service onthe surviving DAG members in Datacenter-Bin
preparation for the Restore-DatabaseAvailabilityGroup command.
Box 2:
Stop-Service CLUSSVC<or> net stop CLUSSVC
Box 3:
The final step is to run Restore-DatabaseAvailabilityGroup. This task forces the Cluster services online on
the remaining DAG Members, evicts the DAG Members on the stopped servers list, and configures the
appropriate Quorum Model.
Restore-DatabaseAvailabilityGroup identity DAGNAME activeDirectorySite:Datacenter-B
Reference: Datacenter Activation Coordination and the Prevention of Split Brain