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Dear @kechler polycarpe,
Thank you for providing the detailed information. I understand how frustrating it can be when a specific OneNote section does not load completely on one device while it works correctly elsewhere.
Based on what you've described, the notebook and account appear to be functioning normally, as the section can be viewed successfully in OneNote on other devices and through the web version. This suggests the issue may be related to the local OneNote synchronization cache or the connection between the desktop app and the notebook.
In this case, could you please try the following steps?
1.Open the notebook in OneNote for the web and confirm that all content is visible.
2.Close the affected notebook in the OneNote desktop app.
3.Return to the web version, open the notebook, and select Open in OneNote to re-establish the connection between the desktop app and the cloud notebook.
4.In OneNote, go to File > Info > View Sync Status, then select Sync Now for the affected notebook.
5.Check whether OneNote displays any sync errors, warning icons, misplaced sections, or conflict pages.
6.Sign out of OneNote, fully close all Office applications, restart the device, and then sign back in using the account associated with the notebook.
Additionally, I recommend reviewing and following the troubleshooting steps in the article Fix issues when you can't sync OneNote, as it contains several targeted troubleshooting methods for scenarios where a notebook, section, or page does not fully sync or load in the OneNote desktop app. This includes checking sync status, reopening the notebook from OneNote for the web, recreating affected sections, and addressing potential sync conflicts.
If you encounter any difficulties while following the steps above, please let me know which step you are having trouble with, and I'll be happy to clarify further.
Thank you for your patience and cooperation, and I look forward to your update.
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