According to Microsoft, the OneNote sync error 0xE40105F9 occurs when you are using an outdated version of OneNote which is no longer supported by the Microsoft ...

Microsoft has announced that OneNote for Windows 10 will reach its end of support on October 14, 2025. Starting in June 2025, users of OneNote for Windows 10 will experience slower sync performance, ...

When you take notes while you record a conversation in OneNote, OneNote will sync up your notes with the audio. Later, when you playback the audio, OneNote highlights where you were in your notes at ...

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 ...