Onenote gives an error whenever i try to sync

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Hello L C,

I understand that OneNote returns the “Access denied for the resource” error with tag 9hehw and code 0 whenever you try to sync.

This does not appear to be an isolated issue, as several users have recently reported the same error, particularly with OneNote for Android.

Similar reports:

Error page when trying to login to sync notes on OneNote Android app + 404 support page

OneNote Android app sign-in failure with Error Tag 9hehw and Code 0 (Entra ID authentication token rejection), Recent Pages not displaying

Android OneNote app in offline mode, Sign In yields "Something went wrong. [9hehw]" message

...

This issue has reached the OneNote product team. The root cause has been identified, and a backend fix is currently being rolled out. Please do not uninstall or reset OneNote. You will only need to restart the app. Since the rollout may take some time, it could take up to a day before the fix reaches everyone.

For now, please sign in to OneNote on the web using the same Microsoft account and check whether your notebooks and latest changes are available there. If they are, you can continue using the web version or another device temporarily.

Since this is a user-to-user support forum, moderators and contributors, including external Microsoft employees, cannot directly access Microsoft’s back-end systems or intervene in product development. Our role is limited to sharing technical guidance based on the available information and experience.

Thank you so much for your patience!

Best regards.