OneNote in Teams Won't Open

Hi zoyatimoshenkovagov,

I'm sorry to hear that you're experiencing issues with OneNote in Teams. Here are a few troubleshooting steps you can try to resolve the problem:

1. Clear cache and app data: Go to the settings of the Teams app and look for the option to clear cache or app data. Clearing the cache can often resolve display issues.

2. Sign out and sign back in: Try signing out of Teams and then signing back in. This action can sometimes refresh the app and resolve any temporary glitches.

3. Reinstall the Teams app: Uninstall the Teams app from your device and then reinstall it from the official app store. This process can help fix any corrupted files or configurations.

4. Update the Teams app: Ensure that you have the latest version of the Teams app installed on your device. Check for updates in your app store and install any available updates.

5. Access OneNote separately: If the issue persists within Teams, try accessing OneNote separately by opening the standalone OneNote app or accessing it through a web browser. This will help determine if the problem is specific to the Teams integration.

6. Contact support: If none of the above steps resolve the issue, reach out to the support team for Microsoft Teams or OneNote. They will have the expertise to assist you further and troubleshoot the problem.

Remember to save a backup of your notes if possible before attempting any troubleshooting steps to ensure you don't lose any important information.

Please explore the link below to solve the problem further:

https://answers.microsoft.com/en-us/msoffice/forum/all/onenote-notebook-not-opening-on-onenote-windows-10/9b772874-920f-433c-b921-34b51f5ece95