Why are you doing this? Posting in a way that suggests purposely confuses/obfuscates the difference between the general concept of a copyright notice and the practice of putting a copyright comment at the top of every file in a project, then immediately get corrected, then post basically the same intentional misunderstanding on someone else's comment elsewhere in the thread.

You:

> I don't think Microsoft removed the copyright notice. I think that the original author did not add one...

Direct quote that from the file containing and requiring the copyright notice in derivative works that was not included in Microsoft's fork. This was also included in a comment which you have replied to:

> The above _copyright notice_ and this permission notice...

No, not somewhere. That’s the license. If they reuse it, they have to use that license.

They removed the attribution to the original authors and replaced it with their own name. So the copyright notice is not preserved. They could comply with the licence by adding back that attribution.