It's incredibly easy to find someone at a company like Microsoft who would know who the person is to make a decision like this. For example; I'd start on Linked

It's incredibly easy to find someone at a company like Microsoft who would know who the person is to make a decision like this. For example; I'd start on Linkedin or Twitter, searching for someone with a title that contains "Security", "Senior", "Distinguished", "Manager", etc. You'll find a dozen people. Send a few messages out that outline the situation. They're not the person who makes that decision, but they'll know where to direct it, and if its serious, they'll direct it. No, there's no phone line. No one calls anyone anymore. Find an entry into their corporate graph, and let them resolve it internally. Or, get an article published on a high-profile blog outlining why they should buy it, and they'll be calling by Monday. Its not that hard.