The licenses for Microsoft's open source projects underwent a formal evaluation process by the community according to OSI's published policies and procedures. Questions were raised and addressed by Microsoft and others to have a vigorous and thorough discussion. Microsoft submitted their licenses to OSI like dozens of other organizations have in the past without asking for special treatment or receiving any.

1. “The formal evaluation of these licenses began in August and the discussion
of these licenses was vigorous and thorough. The community raised
questions that Microsoft (and others) answered; they raised issues that, when
germane to the licenses in question, Microsoft addressed. Microsoft came to
the OSI and submitted their licenses according to the published policies and
procedures that dozens of other parties have followed over the years.
Microsoft didn't ask for special treatment, and didn't receive any.”
OSI