Hi, Had a mailbox store fail and quite a few backups. Powersurge caused ailbox corruption. All the log files were there bar one which made replaying impossible. The backup was a month old. I wish to restore from the users OST files. How do I go about doing this? I assume if they connect their Outlook will resync with the now outdated mailstore. Therefore I have dismounted the store. Should I log in to each pc and export to PST? Recreate the Outlook account and import? Any help appreciated.

Hi Before doing anything Are you able to mount the database? If not, check the health of it by using eseutil /mh path-to-database Jonas Andersson MCTS: Microsoft Exchange Server 2007/2010 | MCITP: EMA 2007/2010 | MCSE/MCSA Blog: http://www.testlabs.se/blog

I've restored a month old backup. All their backups were unusable. The current stored had the edb file set to 0 bytes (power outage).

Ok Now they will understand why it's important with a good backup and backup plan to test that everything works like it should :) You have the best sell arguments.. Ok does that backup work then? Able to mount and connect with Outlook to the mailbox?Jonas Andersson MCTS: Microsoft Exchange Server 2007/2010 | MCITP: EMA 2007/2010 | MCSE/MCSA Blog: http://www.testlabs.se/blog

Yes the old one does... but question is with Outlook. When outlook connects with an OST file (cached mode) is it going to wipe that month thats cached out, or is it going to go in to outlook recovery mode, or something else? I am quite scared about losing the mail, but it IS in the OST files. If all else fails, I was going to have the mailbox stored un mounted and manually export OST->PST. That's alot of work though...

To be honest, i don't know what it will do with the OST file, but to be sure, make a safe copy of it and do some tests on a client OST->PST->Import is not so very funny but it will solve it..Jonas Andersson MCTS: Microsoft Exchange Server 2007/2010 | MCITP: EMA 2007/2010 | MCSE/MCSA Blog: http://www.testlabs.se/blog

Just thought I'd give an update for anyone else that runs in to this issue. Everyones mailbox was exported. When mounting the restored database, all clients connected. The months worth of email in the OST file did not sync, which is what I expected. I then imported the mail replacing all mail (to force a resync). This worked. OST recovery for the win ;)

Good work! Thanks for sharingJonas Andersson MCTS: Microsoft Exchange Server 2007/2010 | MCITP: EMA 2007/2010 | MCSE/MCSA Blog: http://www.testlabs.se/blog