NO OPTION for Radius Authentication on PTP 450i BHM

Products PTP
7

I'd like to try to use Radius for user authentication on PMP450.

This  document shows it can be done for remotely authenticating users:

http://community.cambiumnetworks.com/t5/PMP-Configuration-Examples/Using-RADIUS-Server-with-PMP-450/td-p/52305

Check in the section "Web User Authentication"

I'm running 14.2.1 and can't seem to find that section. Is it hidden on the Security Tab? Do I have to enable Radius AAA for SM authentication first before I see it available for User Authentication?

Thanks,

Kevin