Problem with WPA2 Enterprise on iPhone

I struggle to get an iPhone 6s with IOS 10 onto our corporate wireless network (WPA2 Enterprise). It's not my phone, so I don't have access to it except when helping the user.

The phone has been restarted, the Wi-Fi profile is removed, the network settings has been reset. I forgot to check the profile/802.1X settings, which has often been an issue on Mac (we have to delete it separately), could this be the reason?

The network is an international Wi-Fi called "eduroam", and it is accessible many places. It used to work, but the problems started after she had traveled, and had attempted to log in to eduroam at a new place. I don't think this other place uses 802.1X either, so I don't have high hopes for fixing it that way.

I don't want to contact her before I have some good solutions to attempt. She's sort of impatient too, and since it is her phone she can't just leave it with me for an hour.