Hi there I joined this forum purely to post this reply, hopefully it helps your case. I was dealing with this problem today, and got to the point where I had the exact same issue above. My Windows 10 wifi would not authenticate, but my iPhone wifi would authenticate and work fine with the username and password once you trust a cert.  I solved this on my Windows 10 machine by connecting to the SSID, and not ticking "use my Windows user account" at the prompt, and instead I typed in my username and password without the domain prefix.  A new message will appear asking you to confirm the expected domain it found, then it connects. Who knew. ... View more