Using PST files instead of outlook ost

We are trying to implement a distaster recovery solution for Exchange Email, and the quickest possible solution we can conclude on it to instead tell Outlook to deliver their exchange email to a PST with is stored on the server.  Therefor their psts get backed up by ntbackup from a scheduled daily backup.

Thus if the server were to fail we could restore the psts very easily and connect the users to their pst files, however there appears to be some contention in the office as to wether or not this is a best practice.  Does anyone know if there will be any issues with this methodology?  Thanks you
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Glen KnightCommented:
Storing PST files on a network us unsupported, if you have the space to store them on the server just leave them in the mailbox, they will then get backed up when you perform the exchange install.

See details here of PST issue:

OST files are simply a copy of what is stored on the Exchange Server.

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what you are proposing can be one of the layers of redundancy you can add to your DR efforts, another layer of redundancy is to make sure your backup software is backing up your exchange, NTBackup is not a good choice, it will get it done but not a good choice, Backup Exec from Symantec is a good choice. it backs up your exchange's information store and allows a brick level restore (individual mailboxes) as well. another level you can add is an external archiving service like mxlogic, which can provided archiving of emails off site.

with these three in place you should be good in the event of a disaster
evanmcnallyIT ConsultantCommented:
For brick level backups, you may want to try BackupAssist.  It's quite a bit cheaper than Symantec BackupExec, and is just as good for a single-server environment.

Having Outlook deliver to PST if the server is down is probably not a very good plan.  You should focus on quick restorability of the server instead.  The best way for a quick restore would be to have Windows 2008 and a newer version of Exchange.  The bare metal restore feature that is included with 2008 is extremely good and very fast.  The change in backup technology between Server 2003 and 2008 is by itself a good reason to consider an upgrade.   PSTs do not have any of the information for your Exchange organization, that would all be in the application/information store.  If you just had PSTs after a disaster, you would have the messages, but turning this into a working email server again would be a major PITA.  You want to just restore the server if possible.
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