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Your opinion on exchange 2010 back ups even though you have DAGS.

Hello everyone and I am very grateful for this site and would like to get your opinion on something. I am in a Exchange 2010 Environment and  We have a 3 member DAG with 2 copies of the database. One active and the other 2 are passive waiting to be rolled over. This is all at one site and since we have it setup this way my boss does not believe we need to do any back-ups. Can you please offer and share your opinion on doing it this way.
1 Solution
Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
If you simply have DAG get backups if otherwise get into LAG concept where you would have 14 days buffer at max .... Backups are always needed and should be in place as requirements do keep coming :)

- Rancy
Suliman Abu KharroubIT Consultant Commented:
Backup is not only for DBs, it is  also for exchange configurations... it is needed all the time.

Also, what if someone hacked the exchange server and deletes the DB ?! there should be a backup to recover the server.
Vijaya Babu SekarAssociate Ops ManagerCommented:
Yes should required the backups, even if you configured DAGs because, as per you configured DAGs are single not site to site resiliency, In this case, your site will fire, DAGs has replicate to another site. but you dont have option. so you should have backup, and more you need to clear the transaction logs so you need to take backup full or incremental backup.

Backup would be helpful for restoring the mail items or mailbox.

For best practices, you can take daily full backup if the DB size is more , you can take incremental backup for daily basis. and full backup would be weekly backup.  

Incremental Backup:

it will backup only transaction log and truncate all those transaction logs.

Full Backup:

it will backup EDB (DB) and transaction logs finally it will truncate all those transaction logs

Simon Butler (Sembee)ConsultantCommented:
Microsoft don't backup their platform.
If you had a copy off site then I would probably sayou could get away without a backup. However there is no single answer.
It very much depends on the business you are in. If it is regulated at all then you may well need to retain a backup for archival purposes.

What a DAG does allow you to do is store backups for different reasons. Most of the sites I manage that have multiple database copies will only backup once a week. Their deleted item retnetion time is pretty high (60 days or more). That means recoving data for user deletions is rare, because they can get it back.

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