I am unable to insert an attachment in OneNote for Web

AV1992 20 Reputation points

I am trying to insert a file in OneNote on the web

The file is an Outlook item with an extension .msg

I keep getting an error "Unsupported File Format. Seems like you have inserted an unsupported file"

This works on OneNote App for Desktop

A family of Microsoft products that enable users to capture, organize, and reuse notes electronically.
172 questions
OneNote Management
OneNote Management
OneNote: A family of Microsoft products that enable users to capture, organize, and reuse notes electronically.Management: The act or process of organizing, handling, directing or controlling something.
174 questions
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Accepted answer
  1. Emily Hua-MSFT 27,556 Reputation points

    Hi @AV1992

    Based on my tests, I can reproduce your issue and in my opinion, it seems to be by design.

    But if you store the notebooks on your personal OneDrive instead of OneDrive for Business, then you may insert .msg file as an attachment into OneNote for web.


    The workaround is as you said, inserting the .msg file via OneNote desktop app first and sync to OneNote for web. But under this case, this .msg file can not be viewed online, you need to download it.


    Or you may upload the .msg file to OneDrive first, then copy link of it, and paste to OneNote for web, then you may view it online.

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  1. AV1992 20 Reputation points

    Is this by design or are there any limitation?