Good day!
Welcome to Microsoft Community. Thank you for sharing your concern with us today and we hope that all is well. I'm sorry to hear that you're experiencing issues with logging in to OneNote on your Android device. To troubleshoot this issue, please try the following steps:
- Make sure you have a stable internet connection.
- Check if your Microsoft account is working by logging in to another Microsoft service.
- Clear the cache and data of the OneNote app on your Android device.
- Uninstall and reinstall the OneNote app from the Google Play Store.
- Restart your device and try logging in to OneNote again.
Regards,
Fritz-Bald
Microsoft Community
Moderator