A corporate environment will include Exchange Server 2010. You need to recommend a solution that
allows point-in-time recovery of the mailbox databases. What should you recommend?

A.
Disable circular logging.

B.
Configure the transport dumpster.

C.
Use lagged database copies.

D.
Use highly available database copies.

Explanation:
Point-in-time database snapshot
If a past point-in-time copy of mailbox data is requirement for your organization, Exchange provides
the ability to create a lagged copy in DAG environment. This can be useful in the rare event that
there’s a logical corruption that replicates across the databases in the DAG, resulting in a need to
return to a previous point in time. It may also be useful if an administrator accidentally deletes
mailboxes or user data. Recovery from a lagged copy ton be faster than restoring from a backup
because lagged copies don’t require a time-consuming copy process from the backup server to the
Exchange server. This can significantly lower total cost of ownership by reducing end-user downtime.