Yes when i copied the URL from the Redirect URI parameter into supplicant . it worked and i was able to perform the assessment. But automatic redirection is not happening.And yes COA and http service was a good point which you made , somehow i didn't...
What if there is no Firewall in between ? like what i am doing right now in my local environment is having 3 devices supplicant , Authenticator which is a Switch and a AAA ISE 2.4Supplicant - win 10 with Firewall OFFI am successfully able to perform ...