First, it is important to acknowledge the elephant in the room. Microsoft does not produce an official portable version of OneNote (or Office). Their licensing model is tied to user accounts and device installations. Microsoft wants OneNote installed via the Microsoft Store, Office 365, or standalone MSI installers to ensure telemetry, updates, and license validation.
Take notes anywhere for free | Microsoft OneNote for the Web Microsoft Onenote Portable
Author’s Note: This article was researched using portable browsers, virtual machines, and a collection of USB drives. No registry keys were harmed in the writing—except for the three test machines sacrificed to OneNote 2007 experiments. First, it is important to acknowledge the elephant
While there is no official standalone "Portable" version of Microsoft OneNote provided by Microsoft, you can achieve a similar "portable" experience through several official and alternative methods. Microsoft wants OneNote installed via the Microsoft Store,
Software should serve you, not trap you. A portable OneNote turns any PC into your PC – instantly.