iOS 5 device can't authenticate by using 802.1x but iOS 7 device can authenticate. My customer did try few method to authenticate as below for iOS 5 device:
* username/DOMAIN name ; password
* username (without name) ; password
above method cannot be authenticate.
iOS 7 device and any other Android version able to authenticate.
Now the firmware is running 6.3.1.1-4.0.0.1
Please advise.