Can i mount a restored shadow copy of the EDB file?

All,
 My client had a power outage, and when the server was brought back up, the EDB was 0 k.  I did a "restore previous version" and now have the file again.  It was dated yesterday.  What are the repercussions of mounting this version of the store.  the client PCs have their mailboxes in cached mode, so I am unsure whether they will sync back up to the server, or do I need to export the OST to PSTs and import once the users are reconnected?
 I know there may be a disk issue, so I created a new DB, and will move the clients to that DB.  The PUB, btw, seems unaffected.

Also, if I was to use the Microsoft backup to an external USB, how would I go about restoring the exchange store?  Does it even back that up?

  Thank you!
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Lorenzo CricchioPresidentAsked:
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Adam FarageEnterprise ArchCommented:
im pretty sure that is unsupported and will not work as the checkpoint file will not match the dbTime of the actual database, and or would the logs. The database would be in a "dirty shutdown" state, and I am not really sure how you would recover that since you would replay additional logs that would go past the time of the actual restoration which can furthermore cause issues.

I would recommend restoring the database from backup. http://technet.microsoft.com/en-us/library/aa996859%28v=exchg.80%29.aspx
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WORKS2011Austin Tech CompanyCommented:
My client had a power outage, and when the server was brought back up, the EDB was 0 k.  I did a "restore previous version" and now have the file again.  It was dated yesterday.

Are you familiar with eseutil /mh, I can show you how to run this it’s easy just let me know if you need assistance. First thing you want to do is check the state, if the database is in a clean shutdown you should be able to restore back to the server. Please confirm Active Directory was not rebuilt or experienced any corruption.
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WORKS2011Austin Tech CompanyCommented:
What are the repercussions of mounting this version of the store. the client PCs have their mailboxes in cached mode, so I am unsure whether they will sync back up to the server, or do I need to export the OST to PSTs and import once the users are reconnected?

To be safe I would rename each .ost folder old to keep it available, you could restore data if needed. As well after the database comes back online I feel it’s better to reset the ost at this time. This all depends on the state of the edb, whether it's in a clean or dirty shutdown state.
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WORKS2011Austin Tech CompanyCommented:
Also, if I was to use the Microsoft backup to an external USB, how would I go about restoring the exchange store?  Does it even back that up?

Yes it backs up exchange, it sounds like restore to the secondary restore group is what you want to do. Who configured the backups?
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Adam FarageEnterprise ArchCommented:
@works2011,

Are you familiar with eseutil /mh, I can show you how to run this it’s easy just let me know if you need assistance. First thing you want to do is check the state, if the database is in a clean shutdown you should be able to restore back to the server. Please confirm Active Directory was not rebuilt or experienced any corruption.

If you are talking about restoring from a VSS snapshot, it wont work. If you are talking about restoring from a VSS enabled Backup (such as Windows Backup) that would work without an issue. He would have to create a recovery storage group, and then follow the direction in the technet article I provided.
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WORKS2011Austin Tech CompanyCommented:
true, as well doesn't he need to determine the state of the database before any recovery.
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Lorenzo CricchioPresidentAuthor Commented:
OK.. here is what happened:  "restored" a copy of the EDB via Restore Previous Version.  Once restored, the  chk / log files were moved to a backup folder, eseutil found the file dirty, and had to be repaired, which took a few hours.  After, it mounted without issue.  The cached users mail had still been there and all seemed ok when the outlook clients reconnected to the store.  I tested OWA, - OK.. interoffice email between users- OK.  Then ultimately opened up the firewall to let mail  through which again, all seemed to be OK.
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