Microsoft historically confused users with "OneNote 2016" (Desktop) vs. "OneNote for Windows 10" (App). The offline installer installs the full desktop client (classic style). While this is powerful, it may look different from the version your friends or colleagues are using, leading to sync questions or UI confusion.
: Keep a specific version of OneNote for legacy systems. How to Download the OneNote Offline Installer microsoft onenote offline installer
Here is a breakdown of the pros, cons, and the user experience of using the OneNote Offline Installer. microsoft onenote offline installer
setup.exe /configure configuration.xml