After a couple of days of research I found Kinguin based on a reputable article. I was still skeptical, but the need out weighed the risk. I reviewed King's instructions for activation. I logged into my Microsoft account just to ensure all is good. Then proceed with adding MSO-Pro16 to cart and checked out. I waited for my email confirmations, took screen captures of my KEY, which I received in a couple of minutes, and proceeded. I clicked on the instructed link, which took me to my MS account and activated through their, YES I did do the telephone activation, which was not a problem or hindrance. I had my product working within minutes and I am so pleased!