How can I convert an OST file to PST in 2025?

[kabirsaini]

Yes, you can export OST files to PST format while preserving all your data. There are two primary methods available to convert OST files to PST format.

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How to Convert OST to PST Manually​

Follow the steps below to manually convert your OST file to a PST file using Microsoft Outlook:

1. Launch Microsoft Outlook
   Open Microsoft Outlook and make sure both your Outlook profile and the offline mailbox (.OST file) are accessible.
2. Import OST Data
   Navigate to the File menu, then select Open & Export > Import/Export.
   Choose Import from another program or file, then click Next.
   Select Outlook Data File (.pst) and click Next again.
3. Export Mailbox to PST
   Go back to the File menu and choose Open & Export > Import/Export.
   This time, select Export to a file and click Next.
4. Select PST Format
   Choose Outlook Data File (.pst) as the export format, then click Next.
5. Choose Mailbox Content
   Select the mailbox folders you want to export. You can either export specific folders or the entire mailbox.
6. Set Export Location
   Choose a destination on your system to save the exported PST file. If needed, enable options to avoid duplicates.
7. Begin the Export
   Click Finish. A pop-up window may appear confirming that messages will be exported to Microsoft Outlook or Exchange.
   Click OK to proceed.
8. Wait for the Export to Complete
   The export process will begin. Depending on the size of your mailbox, this may take some time. Once finished, your OST file content will be successfully converted to PST.