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How can I recover data from exchange server 2010

Posted on 2015-01-14
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Last Modified: 2015-01-15
We have a client that is now on Office 365. We migrated them from an in house exchange server 2010 to Office 365 back in April 2014 with no issues. Yesterday a user went to his calendar and saw that all his MANUAL entries from all of February 2014 and the past are missing but the reoccurring event entries are still there. All other users still have all there entries so this is isolated to one user.

We don't know when the entries have disappeared until the user searched for them yesterday. Is there a way we can get data from the old Exchange Server DB file and extract it for that user so we can import back to Office 365.
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Question by:IT_Fanatic
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Vasil Michev (MVP) earned 500 total points
ID: 40549498
If the old Exchange servers are available, you should be able to export the mailbox to a PST file, or even do a targeted Search-Mailbox for only calendar items. Importing to the new mailbox from the recovered PST should not be a problem then.

BTW check what the archiving/retention policy on that mailbox and the Calendar folder is (the default folder policy applies to Calendar since 2010 SP2: http://blogs.technet.com/b/exchange/archive/2012/08/14/calendar-and-tasks-retention-tag-support-in-exchange-2010-sp2-ru4.aspx), as the items might be moved/deleted by the policy instead.
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by:IT_Fanatic
ID: 40549523
Ive disabled all the exchange services on our exchange server. Do I simply just need to turn on all the services and that's it regarding to have our old exchange server go online? We it cause any issues with the users on 365?
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by:Vasil Michev (MVP)
ID: 40549810
Depends on several factors. If your MX and Autodiscover records are pointing to the cloud, and you have removed/disabled the local autodiscover (SCP, the virtual directories or simply used the reg keys to stop Outlook for looking at local autodiscover), you should be fine. But that's the general talk, there might be something specific to your configuration that can cause an issue, so you might consider doing this over the weekend or similar.

I'd still recommend that you first check the retention policy and the archive mailbox for that user.
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by:IT_Fanatic
ID: 40549874
The user has no retention policy nor archives
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