Microsoft use a lot of different technologies. It’s a large company and generally at big tech companies there’s no company-wide mandate about frontend frameworks/libraries. They use React Native in a bunch of things, including in Office, the Xbox app, and some of the apps that ship with Windows. They have a lot of apps written in C++. They have some Electron apps too. They have web apps using React, some using Angular, and some using custom frameworks.
Microsoft use a lot of different technologies. It’s a large company and generally at big tech companies there’s no company-wide mandate about frontend frameworks/libraries. They use React Native in a bunch of things, including in Office, the Xbox app, and some of the apps that ship with Windows. They have a lot of apps written in C++. They have some Electron apps too. They have web apps using React, some using Angular, and some using custom frameworks.