If you are seeing the OneNote 9hehw error on your Android phone and other devices, you are not alone. Several users have reported that OneNote suddenly shows “Working offline. Sign in to sync your notes”, but tapping Sign in results in “Something went wrong. [9hehw]” or “Access denied for the resource.” The reports started appearing around August 26–28, 2026, and affect different Android phones, including Samsung Galaxy and Google Pixel devices.
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Why is the OneNote 9hehw error happening?
The exact cause has not been confirmed by Microsoft. However, the available reports strongly suggest that this is a background server-side issue. Users have reported that OneNote continues to work on Windows and through a web browser, while the Android app fails to sign in. One detailed report also reproduced the problem on multiple Android devices.
The error itself shows “Access denied for the resource,” Tag: 9hehw, Code: 0. The reports suggest that the application may be failing during the authentication or token process. This is still an observation based on the reported symptoms rather than a confirmed explanation from Microsoft.
How to fix the OneNote 9hehw error?
There is currently no confirmed permanent fix in the supplied reports. Users have already tried clearing the cache and app data, restarting the phone, uninstalling and reinstalling OneNote, and even testing older versions of the app. In one report, several older versions produced the same OneNote 9hehw error, which makes simply rolling back the app version unlikely to be a reliable solution.
However, there are a few workarounds that may help:
- Use the Notebook List instead of Recent Pages. Several users reported that their notebooks can still be opened and, in some cases, changes continue to sync when accessed this way. The Recent Pages section appears to be one of the areas most affected by the problem.
- Open OneNote through OneDrive. One user reported that opening the OneDrive app, allowing it to sync, and then opening OneNote helped keep changes syncing between the phone and cloud. This does not remove the sign-in error, but it may provide a temporary way to keep notes updated.
- Use OneNote on the web or Windows. Microsoft recommends checking OneNote on the web when mobile synchronization problems occur, and users affected by this particular issue have confirmed that desktop and web access can continue to work normally.
It is also worth avoiding repeated uninstalling and clearing of app data if you have notes that may not have synced. Microsoft specifically recommends checking that notes are fully synchronized before taking actions that could remove local data.
Is Microsoft aware of the error?
The Microsoft Q&A threads show a growing number of user reports across different phone models and Android versions. Based on the information in the supplied resources, there is no confirmed public statement from Microsoft identifying the cause or announcing a permanent fix for the OneNote 9hehw error.
For now, if the OneNote 9hehw error is preventing you from signing in on Android, try accessing your notebooks through the Notebook List, OneDrive, OneNote on the web, or Windows. If your notes are important, it is also a good idea to verify that your latest changes are actually syncing before relying on the Android app again.
Have you found another workaround for the OneNote 9hehw error? Let us know in the comments so we can update this article.