According to Microsoft, the OneNote sync error 0xE40105F9 occurs when you are using an outdated version of OneNote which is no longer supported by the Microsoft ...

According to Microsoft, this error occurs when OneNote cannot refresh your notes automatically. This is a temporary error, hence, you need to wait for some time and ...

OneNote for Windows 10 loses support on October 14, 2025. Users are urged to transition to OneNote on Microsoft 365 sooner. Delayed migration may result in slower sync performance and nudging from ...

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, ...