Which specific product/page of a Microsoft product uses Fluent UI react?

[catmanjan]

I saw a mention in the doco that some components are used in 100s of internal tools, and in Azure and M365 - but I haven't actually seen it used anywhere

Is this no longer true?

[MukundaKatta]

Still very much true — Azure Portal (most surfaces), Microsoft 365 admin center, Teams web, Outlook on the web, GitHub's settings pages in some areas, and Microsoft Defender for Cloud are all built on Fluent UI React. You can inspect DOM class names like fui-Button or ms-Button to see it live on any of those sites. Internal tool counts aren't public but the 100s figure has held up.

[tudorpopams]

Hello @catmanjan , most, if not all Microsoft web based products use Fluent UI React, either using v9 directly, or a combination of v8 and v9 (until they fully migrate to v9). As @MukundaKatta mentioned above, you can use the inspector and lookf for fui-* (v9) or ms-* (v8) class names.