A family of Microsoft products that enable users to capture, organize, and reuse notes electronically.
Use Microsoft’s current centralized Fix issues when you can't sync OneNote guide; it covers OneNote on iPhone and iPad and supersedes relying on older issue-specific articles.^1^
Current iPhone and iPad procedure
Before signing out, closing notebooks, resetting credentials, or reinstalling OneNote, copy any recent unsynced notes somewhere safe. Microsoft warns that these actions can cause loss of changes that exist only on the device.^1^
- Check the notebook in OneNote for the web
- Open
https://www.onenote.comin Safari and sign in with the same work or school account. - Open the affected notebook and check whether the latest pages appear.
- If the notebook does not open in the browser, the problem is not limited to the iPhone or iPad. For a SharePoint-hosted notebook, contact the Microsoft 365 or SharePoint administrator.
- Open
- Trigger an iOS synchronization
- Open OneNote and leave it in the foreground.
- Return to the Notebooks list.
- Pull down on the list until the spinning progress indicator appears.
- Leave OneNote open while it attempts to synchronize.
- Update OneNote
- Open the iOS/iPadOS App Store.
- Search for Microsoft OneNote and install an update if offered.
- If other Microsoft 365 apps are installed, update those as well because Office apps share sign-in credentials.
- Reset the OneNote account session only after safeguarding unsynced notes
- On iPad: OneNote → gear icon in the upper-right.
- On iPhone: OneNote → … → Settings.
- Under Account, select the affected account, select it again, and choose Remove Account.
- Close OneNote completely, reopen it, and sign in again.^1^
Narrow down the failure
- One notebook or section fails: On a desktop where the notebook is current, create a new section and **copy—not move—**the affected pages into it. Sync the notebook and verify the copies appear on iOS before deleting anything.
- All notebooks fail only on one iPhone or iPad: This points toward the device’s app session or credentials; use the account-reset procedure above.
- The notebook also fails in OneNote for the web: For a business notebook stored in SharePoint, have the administrator check access and service health.
- An error code appears: Record the complete code and message; the current guide contains code-specific branches and may show a Get Help option.^1^
The OneNote for iPhone support hub also links to the current iOS sync troubleshooting material.^2^ The separate recent issues page should not be treated as a newer sync article: its displayed update date is February 2020 and several entries are from 2017–2018.^3^
References