You are the messaging engineer for your company.

You plan to deploy Exchange Server 2007.

You need to recommend a plan to back up the mailbox databases. Your backup plan should meet the following requirements:

A full backup of the Mailbox database must be performed twice a day.

Backups must not interfere with online maintenance.

Backups must have minimal impact on server performance.

Which two elements should your backup plan include? (Each correct answer presents part of the solution. Choose two.)

A.
Add additional physical disks to the mailbox servers. Move transaction logs to the new disks.

B.
Add additional physical disks to the Mailbox servers. Configure each storage group to use local continuous
replication to replicate the databases on the new disks.

C.
Create additional storage groups and mailboxes databases. Distribute mailboxes across multiple mailbox
databases.

D.
Perform streaming backups of the mailbox databases at 1:00 p.m. and 11:00 p.m.

E.
Perform volume shadow copy backups of the active copy of the mailbox databases at 1:00 p.m. and 11:00

F.
Perform volume shadow copy backups of the passive copy of the mailbox database at 1:00 p.m. and 11:00

Explanation:
EMC > Server Configuration > Mailbox > Database Management > Storage Group > Enable LCR Wizard…

Local continuous replication is a single-server disaster recovery solution using built-in asynchronous log shipping and replay technology to create and maintain a copy of a production storage group (active copy) on a second set of disks connected to the same server (passive copy). Manual activation of this reserve data copy is provided for.

LCR enables you to offload VSS backups from the active to the passive copy of the storage group. All four VSS backup types (full, copy, incremental, and differential) can be taken from the passive copy.

http://technet.microsoft.com/en-us/library/bb125195.aspx