The 2.6 release series (including Beta 3) focused on expanding support for modern operating systems and office suites:

: While highly functional, this is not an officially sanctioned Microsoft product and is primarily used to bypass activation restrictions. exclusions in Windows Defender? Microsoft Toolkit 2.6 Beta | Creation Invention. Creation Invention•1.2M views. harith alsaraf [2026 Updated] Microsoft Toolkit Free Download Guide

The search results indicate that "Microsoft Toolkit Activator" is a tool used to bypass official licensing for Windows and Office.