How to convert .OST to .PST?

15 pts.
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Microsoft Outlook
Hello All, I need to convert about 16 OST files to PST. So far I have tried the following troubleshooting steps and since they failed and now looking to buy recovery tool but would like to avoid this. Does anyone have any ideas?
  1. Backup ost file(s)
  2. Rename outlook.ost to outlook.pst
  3. Use scanpst.exe from Outlook (in C:Program FilesCommon FilesSystemMapi1033) to repair outlook.pst (You can always copy scanpst.exe from an alternative installation, include MAPI32.DLL and GAPI32.DLL)
  4. Rename outlook.pst back to outlook.ost
  5. Run OST2PST which will then convert the file successfully to outlook.pst
  6. Outlook can then open the outlook.pst file

Answer Wiki

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If you can open the OST file in off-line mode, you can then create a PST and simply copy the contents of the OST over to the PST.  I would like to suggest some manual tricks to convert OST to PST format. Read this blog to understand how you will use “Export option” of Microsoft Outlook. You can also try archiving.

https://gallery.technet.microsoft.com/OST-to-PST-Outlook-a1ec335c

The trick here is opening the OST at all, since it is typically tied to a specific profile or Exchange Server account settings. If that account is not available, then you may not be able to open the OST.

Discuss This Question: 7  Replies

 
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  • Subhendu Sen
    Whatever you tried, but it is not cleared that, either this is successful. However you can try by download/install a free utility called ost2 (free to use) and it can help to make your job easy. The link is here: http://www.ost2.com/

    Also you can look here for more concepts, https://support.office.com/en-us/article/Move-an-Outlook-data-file-e7b2e7b2-fb87-406c-85c7-04d4b69cf9a0?queryid=07b6fa3a-e7dc-42e6-8f7b-9c5b0763c98a&respos=0&CTT=1&CorrelationId=73581c97-e1ce-4f7e-9f0f-34937db7b137&ui=en-US&rs=en-US&ad=US&ocmsassetID=HA010378297

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  • ChristianJunge
    I tried this utility, but nothing happened
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  • Subhendu Sen
    Is it installed/configured properly? What error message is shown there?
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  • Ashishkr
    It's a very tremendous task to repair your damaged OST files.
    I've made it simpler with the manual process.

    I think you can also try it.

    1. By exporting OST files To PST
    2. By archiving and
    3. By Drag and drop method.
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  • Ashishkr
    You can manually transfer your Offline OST files to Outlook PST file format with the help of inbuilt Import and Export Wizard.

    Trying following steps given below:

    • Open Microsoft Outlook
    • In File Menu --> Open "Import and Export Wizard"
    • Choose Export a File
    • Select OST files to Convert
    • Choose Desired Location to save converted PST file.
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  • johnphlip

    Hi ChristianJunge You can try manual method to convert your OST file to PST as given below:-
    Open MS Outlook
    Go to File Menu and Select "Import and Export Wizard" and press 't'.
    Select Export a File option and click Next.
    Opt PST and click Next.
    Browse and select desired location to save converted PST file.
    Hit the Finish Button
    OR
    You can us a third party Kernel for Exchange OST to PST Tool to convert your OST file to PST if you are a non technical user.

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  • stevesmith27
    Try this solution to convert OST to PST format: - https://gallery.technet.microsoft.com/OST-to-PST-Outlook-e1ea9bb0
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