It doesn’t work out of the box, and apparently there’s a bug report for it.
From http://askubuntu.com/questions/279762/cant-connect-to-wpa2-enterprise-peap:
There is a bug report here: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1104476
A workaround is to remove the line
system-ca-cert=true
from the configuration file found in /etc/NetworkManager/system-connections/NAMEOFNETWORK
