Microsoft used to have a group, Trustworthy Computing (TWC), that was where all the security expertise lived. TWC was destroyed in 2014. From the outside, it seemed like that was the point where the reporter/outside security engagement story stopped, because the people that held responsibility for it Microsoft wide were either fired or re-orged into a role where they didn't have broad authority any more. Now, you get stuff like this, where people on the "security" group (which is squirreled away in a totally different part of Microsoft) don't have visibility into the Edge bug tracker any more.

Internally, Microsoft is organized a lot like the Federal government, only worse.