Colin,
I agree, I believe updating the ArubaOS from 6.3 to 6.4 may help I don't believe the type of APs is causing any issues we have a mix of 225 and 135 APs. I wanted to make sure that the 135 are compatible with the 6.4 OS. Ths issue we are having is I cannot get any windows 7 or 10 machines to connect to our 802.1x NPS server (Server 2012), termination is on the Aruba controller. MacOSX machines are connecting fine. I read it could be a TLS issue?
Thanks