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  1. #1
    Senior Member
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    Question How to repair a Microsoft 365 Outlook PST File??

    One of my Microsoft 365 Outlook PST files has decide it will not open

    I have been goggling how to repair a Microsoft 365 Outlook PST file, but all the results have been for early versions of outlook.

    Any ideas?

  2. #2
    Computer Technician wainuitech's Avatar
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    Default Re: How to repair a Microsoft 365 Outlook PST File??

    As long as its actually a .pst, theres a scanpst.exe in the Office folder:

    https://support.microsoft.com/en-us/office/repair-outlook-data-files-pst-and-ost works for Office 2007 onwards ( including 365)

  3. #3
    Senior Member paulw's Avatar
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    Default Re: How to repair a Microsoft 365 Outlook PST File??

    I thought PST files were a thing of the past . Do you still use POP3 email rather than IMAP??
    Regards,

    Paul W
    Taco Bell is not a Mexican telephone company

  4. #4
    Senior Member 1101's Avatar
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    Default Re: How to repair a Microsoft 365 Outlook PST File??

    Quote Originally Posted by paulw View Post
    I thought PST files were a thing of the past . Do you still use POP3 email rather than IMAP??
    pst still commonly used
    Outlook archive is a PST
    exporting old email accounts : exported to pst and added back to outlook as a PST

  5. #5
    Senior Member paulw's Avatar
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    Default Re: How to repair a Microsoft 365 Outlook PST File??

    All my email accounts are OST these days. Microsoft and Orcon. Orcon used to be a PST when it was POP3 but I changed it to IMAP and it's now an OST.
    Regards,

    Paul W
    Taco Bell is not a Mexican telephone company

  6. #6
    Senior Member
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    Oct 2008
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    287

    Default Re: How to repair a Microsoft 365 Outlook PST File??

    I use Colour Categories extensively which OST format does not feature despite Microsoft Community members over a long period asking for that feature.

    My brief period trying o cope with OST hugely frustrated me. Eventually i manged to get back to POP which was a great relief.
    Previously Microsoft Engineers tried to create a workaround in OST to enable Colour Categories for me. They had to give up

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