The OneNote stores notebooks or files in the Cloud using OneDrive, so there is a potential for the internet connection problem, delaying when working on a notebook online with several people or other reasons. In fact, there are many reasons resulting in OneNote not syncing. Hence, what may give rise to this OneNote sync error? Why Is OneNote Not Syncing? However, due to its cross-platform design, you may encounter the OneNote not syncing problem when you sync your data to the Cloud such as OneDrive. The files and data can be shared with other users over the Internet or the Network. It can also sync notes, data and files to the Cloud like OneDrive. The OneNote program can be used on Windows 10 devices, Android, MacOS, IOS or on the Web. It gathers users’ notes, drawings, screen clippings, audio material, etc. OneNote is a computer program, designed to take notes, compile research data, organize information.