Hi Soli_gooner,
Thanks for posting in the community. We are happy to help you.
In general, OneNote 2016 should work fine, and you should be able to use it to sync your notebooks. Since you mentioned that notebooks in OneNote for Android could be synced well, the problem is likely caused by the local environment on your PC. In this case, I would like to suggest you try the following suggestions and check again.
- Make sure you have enough storage space on OneDrive/SharePoint. I assume that your notebooks are stored in your account's OneDrive.
If they are stored in SharePoint, or they are shared notebooks, please point it out and let us know.
If so, to verify this, you can go to OneDrive for Web (go to www.office.com, search for OneDrive in the Search bar, and then click the OneDrive icon). You should be able to see your OneDrive storage in the bottom left corner of the page.
- Please check if the option TLS 1.2 is enabled.
You can go to Control Panel> Internet Options> Advanced> make sure the following options are ticked. If not, please enable it, and then restart your computer.

- I suggest you repair OneNote 2016 and check again.
Go to Windows Settings> "Apps & features" (or Apps> Installed apps)> type "OneNote" in the search bar. Check if you can see OneNote 2016. If you have multiple OneNote applications installed, please note that OneNote 2016 and OneNote for Windows 10 are two different apps.
If you can see OneNote 2016, please click on the three dots, Modify, Repair, and choose Online Repair.
If you don't see OneNote 2016, it is included in the Office suite, you need to repair the Office suite. Find and click on the Office suite, click on the three dots, Modify, Repair, and choose Online Repair.
- I suggest you try the following steps and check again.
a. Sign out of your account from OneNote and close OneNote.
b. Open File Explorer, copy/paste the following path in File Explorer and press Enter. If you can go to the following path, please delete all files and folders in these locations.
%localappdata%\Packages\Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy
%localappdata%/Microsoft/OneAuth
%localappdata%/Microsoft/IdentityCache
c. In the Windows search bar, search for "Access Work or School" (Windows settings> Accounts> Access work or school). Check if you can see your business account in "Access Work or School".
- If you don't see it, please select Connect and add your business account.
- If you can see it, please select it and select Disconnect. After that, please click "Connect" and log into your account again to register the device.
d. Run OneNote, sign into your business account, and try to open your notebooks again.
- Check your network, firewall, etc.
I suggest you connect to another network and check again.
I wonder if you have enabled the proxy or VPN on your device. You can search for "Proxy settings" and "VPN settings" in the Windows search bar, then check these Windows settings. If they are enabled, please disable them, and then check again.
Also, you can temporarily disable Firewall, Antivirus, and the 3rd part antivirus on your device. After that, please check again.
If the above suggestions don't help, I would like to gather more information.
- Please provide a full screenshot of the error message. You can upload the screenshot via "Insert Image".
 and opening a personal notebook? This can help us to troubleshoot whether the problem is caused by your business account.
I would like to know your Windows version. Are you using Windows 10 or Windows 11?
We look forward to your response. Thanks for your cooperation.
Sincerely,
George | Microsoft Community Moderator