A family of Microsoft products that enable users to capture, organize, and reuse notes electronically.
Hello javad
I’m sorry that so much important OneNote content is missing.
Since the notebooks and sections are still visible, this may be a synchronization issue rather than permanent deletion.
Before continuing, do not uninstall OneNote, clear its app data, reset it, or sign out again, as unsynced notes may still be stored locally on your device.
Please try these steps:
- Sign in to https://www.onenote.com/ with the same personal Microsoft account and check whether the missing pages appear there. This helps determine whether the issue is with the app or the cloud copy.
- In OneNote for Android, check More Notebooks > View Sync Errors and look for Misplaced Sections. If pages are there, press and hold a page, select Copy Page, and copy it to a new section. Do not close Misplaced Sections until everything important is recovered.
- In OneNote for the web, check View > Deleted Notes. If available, restore the affected pages with Move or Copy.
- If you have access to OneNote on Windows, right-click an affected page and check Page Versions. Android does not provide page-version or local-backup recovery.
- Check the OneDrive Recycle Bin. Microsoft 365 subscribers may also be able to restore OneDrive to an earlier time within the available recovery period.
I hope one of these recovery locations still contains the missing notes.
Feel free reply back to this post and update me on this issue, I'll be happy to help.