I just experienced this problem with my Microsoft Place of work license not working on my new Mac. It was a real headache endeavoring to figure it out on my own for nearly one hour. So, I chose to Call customer assistance at that shop. In past/former buys, very attentive https://www.reddit.com/r/pcpartpickerbuilds/comments/1dk86kn/is_hypestkey_legit_for_microsoft_products/