OneNote online version sync error

Question

OneNote online version sync error

Kalle Birk 0

I use the online version of OneNote for school, since the desktop version isn't compatible with chromebook (i know...). The last couple of weeks, OneNote has acted up. It has repeatedly decided to erase the last half of the prior day's work when I open my pc the day after. I've tried troubleshooting, looking through page versions, deleted files folders, OneDrive, etc., but nothing has worked thus far.

Have any of you guys had similar experiences, and possibly worked out a solution?

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2 answers

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Answer 1

Heimerdinger 1,465 Independent Advisor

Hi @Kalle Birk,

I’m sorry to hear that you’ve repeatedly lost parts of your school notes. Since you’re using OneNote for the web on a Chromebook, I’d like to narrow down whether this is related to synchronization or the browser.

Could you please let me know:

Which browser are you using, for example Chrome or Edge?
Do you notice any sync warning or error before closing OneNote?
Does the issue occur with only one notebook, or with other notebooks as well?
Is this a regular OneNote notebook or a OneNote Class Notebook provided by your school?
If possible, could you test OneNote in an Incognito/InPrivate window and let me know whether the same issue occurs?

Since you have already checked page versions, deleted notes, and OneDrive without finding the missing content, the answers above will provide more information to help narrow down the cause.

Thank you for your time and patience.

Kalle Birk 0 Reputation points

2026-10-28T12:34:03.0966667+00:00

Hi @Heimerdinger ,

I'm using Chrome, there appears no sync warning or errors prior to closing my computer, the problem occurs over all notebooks, and I'm fairly sure it's a regular OneNote notebook, even though access is provided through my school via Sharepoint. I've tried an incognito-test, where the problem didn't occur, but the first part of my notes always remain, so it feels like the problem is directed at the latter part of the daily work hence why I guess the test was succesful, since it only concerned what would be the initial work.
Heimerdinger 1,465 Reputation points Independent Advisor

2026-10-29T14:29:43.2333333+00:00

Hi @Kalle Birk,

Thank you for providing these additional details.

Based on what I have checked, I’m currently unable to find any Microsoft announcement indicating a known OneNote for the web issue that specifically matches the behavior you described. Microsoft recommends checking Service health for known Microsoft 365 service issues when unexpected cloud-service behavior occurs.

I also tested OneNote for the web on my side and was not able to reproduce the same behavior.

Since the issue did not occur during your Incognito test, I would suggest continuing to use OneNote normally for now and monitoring whether the problem occurs again. Before closing your OneNote tab or Chromebook, please also make sure that your latest changes have had a chance to synchronize. OneNote is designed to save notes automatically rather than requiring a manual Save button.

If the same issue occurs again, please feel free to share the details here, including approximately when it happened and whether the missing content appears in Page Versions. That information may help us narrow down the issue further.

Thank you again for your time and understanding.

Answer 2

What is described matches a notebook sync problem where the latest changes were never fully written back to the cloud. In OneNote for the web, the most useful checks are:

Select the sync error message near the top of the OneNote window.
- This refreshes the session.
- If prompted, sign in again with the same school account that owns the notebook.
Open the notebook directly in OneNote for the web again and verify whether the missing content is actually present there.
- If the notebook cannot be opened in OneNote for the web, that usually points to a server-side issue.
- If the notebook is stored on SharePoint, the documented next step is to contact the administrator.
- If it is stored on OneDrive, check the service status for interruptions.
If the notebook opens in OneNote for the web but content is missing, check whether the device where the notes were last edited had fully finished syncing.
- “Content Not Yet Available” and similar missing-content behavior can happen when a page was added from another device that has not synced yet.
- If the missing content still exists on another device, copy it into a new page or section there and let it sync again.
If the notebook is visible in the browser but the app session is inconsistent, reopen it from the web location.
- Open the notebook from OneDrive in the browser.
- Use Open In OneNote to reconnect the notebook to the app session.
If the issue continues, sign out of all accounts associated with OneNote and sign in again.

Important: avoid signing out, removing, or reinstalling OneNote as a first troubleshooting step when sync problems exist, because Microsoft warns this can cause data loss.

For a school notebook, if it is stored on SharePoint and the problem keeps happening, the supported escalation path is the school administrator.

References: