You have an Exchange Server 2013 organization that contains two servers. The servers are
configured as shown in the following table.

EX1 and EX2 are members of a database availability group (DAG) named DAG1.
You have a database named DB1 that replicates to EX1 and EX2.
EX1 fails.
You discover that DB1 does not mount on EX2.
You view the status of the mailbox databases as shown in the following table.

You need to ensure that the database attempts to mount on EX2 if EX1 fails.
What should you change?

A.
The AutoDatabaseMountDial setting to Lossless

B.
The AutoDatabaseMountDial setting to BestAvailabilty

C.
The activation preference of DB1\EX2

D.
The activation preference of DB1\EX1

Explanation:
* The MailboxServer.AutoDatabaseMountDial property gets or sets the automatic database mount
behavior for an Exchange server that is running the Mailbox server role in a continuous replication
environment after a database failover.
* The AutoDatabaseMountDial property specifies the automatic database mount behavior of a
Mailbox server after a failover. Each behavior is based on the copy queue length, or the number of
logs that are recognized by the passive copy that need to be replicated.
If the copy queue length is greater than the value specified for the behavior, the database does not
automatically mount. If the copy queue length is less than or equal to the value specified for the
behavior, the Mailbox server tries to copy the remaining logs to the passive copy and mounts the
database.
* BestAvailability
The database automatically mounts immediately after a failover if the queue length is less than or
equal to 12.
Incorrect:
Not A: Lossless
The database does not automatically mount until all logs generated on the active device are copied
to the passive device