Computers there is member of our domain Gymund.dk (se picture below) have no problem. Our student computers which is not member of any domain is logging fine with there AD username and password.
But if we got a student which have a computer which is member of another domain, they can't login with there AD account.
It is possible to get this computer on our Wireless Network, but it is not easy.
We are using MS Radius server. We think it has something to do with the configuration below