A family of Microsoft products that enable users to capture, organize, and reuse notes electronically.
The error occurs because the “New Outlook” app is set as the default mail client, and New Outlook is not MAPI‑compliant. OneNote’s “Share e‑mail copy of page” feature requires a MAPI‑compliant Outlook (Classic Outlook for Windows).
To get OneNote and Outlook working together for this feature, use Classic Outlook as the default mail client instead of New Outlook:
- Switch from New Outlook to Classic Outlook
- Open the New Outlook app.
- Use the toggle at the top right (often labeled “Try the new Outlook” / “New Outlook”) to turn New Outlook off.
- This will start Classic Outlook for Windows.
- Make sure Classic Outlook is the default mail client
- In Windows 11, go to Settings > Apps > Default apps.
- Find Outlook (desktop) / Classic Outlook and set it as the default for MAILTO and for Email.
- Restart OneNote and test again
- Close OneNote completely.
- Reopen OneNote and try Share > E‑mail copy of page again. It should now call Classic Outlook and send the page.
If Classic Outlook is not installed in the environment, the IT department must install it; otherwise, OneNote’s email‑sharing feature cannot work because New Outlook does not support the required MAPI integration.
References:
- Email a document from Microsoft Office
- I am unable to share my file either as a presentation or document type or pdf type by none of the microsoft office apps (Word, Excel, Powerpoint). It is continuously showing "Mapi Failure" and "Unable to Share" errors. What can I do? - Microsoft Q&A
- Office 365 apps insist on using Outlook Classic to share documents to email - Microsoft Q&A