This worked for me on corporate network:

Comment #26 from Robert Gerus 2009-11-28 08:07:44 GMT+3 [reply]

I managed to get around this issue by adding the connection for this EAP PEAP
MSCHAPV2 network through the "Internet connections" dialog in the window,
specifying the user name as "user@domain" and, in the "Advanced settings"
dialog, on the EAP tab checking the "Use manual user name" (with manual user
name the same as earlier) and making sure that "Require client authentication"
box is not checked