At work we have multiple locations each with their own separate network. I would like users to be able to connect to the wireless network using their e-mail address and password. I have a test access point setup pointed to a FreeRADIUS server I installed and my linux laptop and Android phone can connect to it fine but Windows XP doesn't prompt for a username or password and keeps throwing up a dialog saying it can't find a certificate. If I check the server, it says XP is sending an empty username and password.
Is there some kind of protocol I can switch to on the server(or something) that would let XP connect without:
A) a certificate
B) configuration changes on the laptop