How to recover deleted MS Outlook OST file?

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Outlook version
Outlook 2016 64 bit
Email Account
Dear experts,

We haven't backed-up the email, deleted the .ost file accidentally then when we open the MS Outlook, all the mails in the INBOX are goneWe would like to ask for tech support on how to recover deleted .ost file?

Please advise, thank you!Any tools, free tools that can be use?

Diane Poremsky

Senior Member
Outlook version
Outlook 2016 32 bit
Email Account
Office 365 Exchange
OST files sync with the server, so the only reason you would need to recover it is if you no longer have the account - in which case you really need to export it as soon as you close the account.

When it's deleted from the hard drive, you need to use a file recovery program - and will have a better chance of recovering it if you haven't used the hard drive since the deletion. The more you use the computer, the better the chance that the area where the old ost was stored will be overwritten.

clark kent

Outlook version
Outlook 2007
Email Account
Hello Brain,

In addition to Daine’s answer, I would like to add one more thing and that is “Dumpster” feature. As you said, you had OST file that means you were connected to Exchange Server. You just need to contact to Server Administrator and they will give your data back, only if they have been running Dumpster on their end.

To know more about Dumpster in MS Exchange: Recoverable Items folder: Exchange 2013 Help

Feel free to ask further!!!!

Note: If my suggested solution does not work, then do not wait too much as you might have to pay for this in future (as Daine said above)

Clark Kent


New Member
Outlook version
Outlook 2010 64 bit
Email Account
hiii, I have faced similar situations like yours. If you are connected with exchange server then you can recreate OST file with new profile.


New Member
Outlook version
Outlook 2016 32 bit
Email Account
Exchange Server
Try to recover your OST files with manual procedure first otherwise use a converter to do that. It will be easier that way.
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