You have an exchange server 2016 organization. The organization contains a Mailbox server named EX01. EX01 contains a mailbox database named DB01.

The volume that contains DB01 fails.

You need to perform a dial-tone recovery of the database.

What should you create first?

A. a new Recovery Storage Group

B. a new mailbox database

C. a mailbox move request

D. a mailbox restore request

E. a lagged database copy

References:

https://technet.microsoft.com/en-gb/library/dd979810(v=exchg.150).aspx