OST File Format Documentation? RRS feed

  • Question

  • I am looking for documentation on Outlook's OST file format. I have found the document at which describes Outlook's PST file format. I wrote some code to read the PST file's header at the binary level, and the code seems to be working. If I run the same code against an OST file, rather than a PST file, there are problems. The header's magic number signatures are not the same.

    Where can I find OST file format documentation?

    • Moved by Quist Zhang Thursday, November 22, 2012 11:44 AM more appropriate (From:Outlook for Developers)
    Wednesday, November 14, 2012 5:01 PM


  • Hi Jeffrey, to reiterate what it states in the thread referenced above, there are currently no plans to publish the OST file format.

    Please let me know if you have any other questions.

    Josh Curry (jcurry) | Escalation Engineer | Open Specifications Support Team

    Friday, December 7, 2012 5:52 PM

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