Hello, I'm trying to set the same thing on my corporate network.
With pre configured Aerohive settings & using UAM shared secret captive portal works with sponsoring. But the "already have an account, login" part does not work. I have a ok in clearpass for auth but I'm stuck at the 1.1.1.1 or 1.1.1.3 address with no connection to the network
If I try the above custom settings it fails with an "internal error 500 error"
Has anyone been able to fix this?