The commit histories for the LICENSE files in the two repositories are rather interesting. The original author placed a single copyright notice in that file. Microsoft on the other hand published it with their copyright notice and a Apache 2.0 license in place of the original copyright notice and MIT license. They also put copyright Microsoft and license apache 2.0 headers on all files. They then changed the Apache 2.0 license to MIT, but left their copyright notice in place of the original copyright notice in LICENSE:
https://github.com/Azure/peerd/commit/473a26c808907f2d9f7b7f...
Unless they forked a very early version that did not even have the LICENSE file, such that they never removed the original notice, this looks like copyright infringement to me. That said, I am not a lawyer.