I am looking to configure an AD authenticated SSID on a C9800 WLC.  In the past I have been able to successfully do this from the 5500 series controllers to a Windows NPS server.  However when I try and configure the C9800 with a Windows NPS server I...

Is there an easy way to see the down or unregistered APs in the 9800 WLC GUI or CLI?  So far all I can find is the list of APs that are currently registered to the WLC.