According to Microsoft, the OneNote sync error 0xE40105F9 occurs when you are using an outdated version of OneNote which is no longer supported by the Microsoft ...

In this post, we will see how to fix OneNote sync error 0xE4020045 (Unsupported Client). Because this is a OneNote sync error, you will not be able to sync your ...

When you sync OneNote notebooks, you ensure your work on Microsoft's notes composition app is consistent and backed up across your devices. By default, OneNote syncs automatically, but there's also ...

OneNote automatically saves your work through its notebook syncing feature. To use this Microsoft note-taking app feature, you have to enable the "Sync automatically whenever there are changes" option ...