Moving Mailboxes and Backup Exec

Hi,

I am looking to move mailboxes to a new DAG which has been redesigned for our needs. I am wondering if I need to add the new DAG to the current backups on Backup Exec 2010 and how I do this? I am very new to backup exec and I have just inherited this environment after the previous person left the organisation, so any help would be GREATLY appreciated.

Many thanks in advance!