OneNote in Office365 error: Send email page sends email with .mht attachment and not embedded in the body of email

Melker Karlsson 1 Reputation point

I'm currently on Office365 version: 16.0.14326.20852

Issue: The OneNote "Send email page"-function creates an email with a .mht attachment instead of the notes embedded in the body of the email. On my colleagues computer it works fine, it works as intended. I have googled and tried several different solutions such as repairing online, changing the mail settings to not allow attachments etc. Nothing is working. Luckily we discovered what we think is causing the problem.

Troubleshooting: OneNote creates the e-mail with the format plain text on my computer. On my colleagues computer it's created with the format HTML. What I think might be the solution is to force OneNote to create the mail with the format HTML. How can I do this?

Kind regards,

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.
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  1. Emily Hua-MSFT 26,921 Reputation points

    Hi @Melker Karlsson ,

    I suggest you go to Windows Settings > Apps > Default Apps, make sure Outlook desktop client is the default app by file type and by link type.

    Then go to Registry Editor, navigate to Computer\HKEY_LOCAL_MACHINE\SOFTWARE\RegisteredApplications, ensuer there is a string Outlook.Application.16 with value of "Software\Microsoft\Office\16.0\Outlook\Capabilities".

    Besides, go to Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail, ensure there is a string (Default) with value of "Microsoft Outlook".

    If you can find Clients\Mail entry under HKEY_CURRENT_USER\SOFTWARE, please also make sure its string (Default) with value of "Microsoft Outlook".

    Serious problems might occur if you modify the registry incorrectly. Before you modify it, please remember to back up the registry for restoration in case problems occur.

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