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OLM Specifications

S-Soft 666 Reputation points
2022-11-08T15:27:44.913+00:00

Hello,
I could find the Pst, Ost and exchange protocol specs on the MS website, but not anything for Olm specs!
To read Outlook Mac storage, already using a 3rd party SDK and that's doing the basic jobs, but problems getting the storage-wide unique itemID and looking for a source, any idea where to start
Thanks

Microsoft 365 and Office Development Other
Microsoft 365 and Office Install, redeem, activate For business MacOS
Outlook Windows Classic Outlook for Windows For business
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  1. Faery Fu-MSFT 19,751 Reputation points Moderator
    2022-11-09T07:32:00.263+00:00

    Hi @S-Soft ，

    OLM is an archive file created by users to export Mac Outlook data (There are multiple mailboxes in OLM file) to local storage while PST is also created by users to store emails, contacts and calendar items etc. However, to access the OLM file, you always need Mac OS.

    If you want to access the OLM files, you can Import a .olm file from Outlook for mac.

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    1 person found this answer helpful.
  2. S-Soft 666 Reputation points
    2023-01-12T23:58:10.33+00:00

    Hello, I'm developing an olm file reader using C#, not related to my query.

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