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How to Fix OneNote Sync Error 0xE00009C8 After Windows Update
Question details
Users are experiencing synchronization failures in the OneNote desktop app following recent Windows updates, resulting in error code 0xE00009C8.
- Product
- Microsoft OneNote
- Device & OS
- Windows 10, Windows 11, Android
- Scenario
- Attempting to sync notebooks in the OneNote desktop application after a system update.
- Observed behavior
- Notebooks fail to synchronize locally and display error 0xE00009C8, even though the data remains accessible and intact via OneNote for the web.
Ensure you do not delete any of your online notebooks or local cache before backing up your notes. You can verify your data is safe by logging into OneNote for the web.
Update OneNote and Force Manual Synchronization
Apply the latest patches from Microsoft and manually trigger the sync process to restore notebook connections.
Microsoft occasionally releases targeted fixes for known synchronization bugs. Ensuring your application is up-to-date and forcing a manual connection can bypass the 0xE00009C8 error.
Open the Microsoft Store or your Microsoft Office Account settings and check for the latest updates available for OneNote, then install them.
Launch the OneNote desktop application and find the specific notebook in the left sidebar that is displaying the sync error icon.
Right-click on the name of the affected notebook and select 'Sync This Notebook Now' from the context menu to force a manual connection to the server.
Access Notebooks via OneNote for the Web
Use the web version of OneNote to ensure continuous access to your important notes while the desktop app sync issue is being resolved.
Try WPS Office for Reliable Document Management
If you frequently encounter sync errors and update bugs with Microsoft Office products, consider switching to WPS Office. It provides a lightweight, highly compatible, and completely free alternative for creating, editing, and managing your essential documents across all your devices.
- 1. Download the software: Visit the official WPS Office website and download the free installer for your operating system.
- 2. Install WPS Office: Run the downloaded setup file and follow the simple on-screen prompts to complete the installation.
- 3. Log in for cloud features: Open WPS Office and sign in to activate your free cloud storage space for seamless, reliable file synchronization.
Frequently Asked Questions
Why does OneNote error 0xE00009C8 happen after a Windows update?
Windows updates can occasionally disrupt background synchronization services or alter network permissions that OneNote relies on, causing the desktop app to temporarily lose its stable connection with Microsoft's servers.
Will I lose my notes if OneNote fails to sync with error 0xE00009C8?
No, your data is generally safe. Any notes synced prior to the error are securely stored on Microsoft's servers, which you can verify via OneNote for the web. Unsynced local edits remain safely cached on your device until a connection is restored.
Does reinstalling OneNote fix the 0xE00009C8 sync error?
Reinstalling might not resolve this specific issue, as it is often a known server-side bug or Windows compatibility glitch. It is recommended to try manually syncing, accessing notes via the web, or waiting for Microsoft to deploy a patch.
Can I copy my unsynced notes to another program?
Yes. If your desktop app is failing to sync permanently, you can manually select and copy the text from the desktop app and paste it into OneNote for the web, or use an alternative document editor like WPS Office to ensure your work is safely backed up.
