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Using cached mailboxes to update Exchange after crash

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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tenaj-207
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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.
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.