Since the introduction of Microsoft’s Volume Shadow Copy Service in Server 2003 it is common to backup the Exchange database in its entirety as part of a bare-metal backup job. This is a great way to deal with a disaster such as a hard drive failure where you want to recover a whole server, or even if you need to recover the whole Exchange database back to a point in time.  The difficulty comes when you want to recover, for example just a single mailbox, or even specific emails.  With a full backup, you are backing up the entire database which means you’ll need to recover the full database first to a temporary location, mount this as a recovery database, connect to it with a client and then extract the data.  With a large database this could take quite a lot of time and resources to complete. BackupAssist has a much easier, more convenient way.