If you're looking for free methods to convert OST to PST, here are some reliable approaches:
1. Using Microsoft’s Native Methods (Free)
a. Recreate Outlook Profile & Export to PST
Since OST files are offline copies of Exchange mailbox data, you can reconnect to the Exchange server and export data to PST:
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Open Control Panel > Mail > Show Profiles.
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Add a new profile and set up your Exchange account.
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Once synchronized, open Outlook, go to File > Open & Export > Import/Export.
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Choose Export to a file > Outlook Data File (.pst).
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Select the folders and save as PST.
Limitation: Requires access to the original Exchange server.
b. Use Outlook’s Archive Feature
If you can open the OST in Outlook:
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Go to File > Info > Cleanup Tools > Archive.
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Select folders and choose PST as the destination.
2. Using Free Conversion Tools (Third-Party)
Some tools offer limited free conversions:
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RecoveryFix OST to PST Converter (Free Trial)
→ Exports a few items per folder for free. -
OST2 Converter (Free Demo)
→ Allows preview and partial export. -
Frre OST to PST Converter (Free Trial)
→ Limited free conversion.
Note: Free versions usually have limitations (partial export, watermarking).
3. Manual Conversion via Thunderbird (Workaround)
If you can’t access Exchange:
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Install Thunderbird and ImportExportTools NG add-on.
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Import OST via mbox format (indirect method).
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Export emails to PST (limited success rate).
4. Using Kernel for OST to PST (Free Scan)
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Scans and previews OST files for free.
Which Method Should You Choose?
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If you have Exchange access, use Outlook’s export feature.
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If OST is orphaned, try a free tool (with limitations).
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For complete conversion, consider a paid tool if data is critical.
Would you like recommendations for a paid tool if free options don’t work?
