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Using cached mailboxes to update Exchange after crash

Posted on 2008-10-12
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Last Modified: 2012-05-05
We just had an Exchange server crash and unfortunately the last good backup was in late September.  However, most (jf not all) of the end users are on Outlook in cached mode.

Once the mailboxes are restored, will the cached mailboxes update Exchange, or will Exchange overwrite the cached mailboxes?  Obviously the latter scenario would not be good as users would lose all of their email and calendar for the past few weeks.

I'm assuming Exchange will get updated by the cached mailboxes but I wanted to make sure before everything hits the fan tomorrow morning.  Thanks!
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Question by:flux303
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tenaj-207 earned 125 total points
ID: 22700093
Exchange will not be updated from the cached mailboxes.  Before you restore any email you need to export the existing profile to a PST and then restore the mailboxes and then re-import the email.  Depending how many users you have and how many had cached email it may be easier to just remove their mailboxes and import their email completely from their PST.
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by:flux303
ID: 22705147
Actually, I found that using cached mailboxes does indeed update the Exchange database.  I may have been unclear describing the original situation--this was a database failure, not a server failure, and we restored the database from backup.  Logging in on clients that were operating in cached mode merged the old cached data with the new mail received since recovery no problem.

Thanks for the response anyway.
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by:tenaj-207
ID: 22705272
I assumed that when you said, "We just had an Exchange server crash" I assumed you meant the whole server crashed.

Glad to hear that everything is back up and running.
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