How to get the certificate of a wireless network?

Hi guys,

I'm having a problem connecting my windows phone to an enterprise wifi network. The network uses peap protocol. As windows phones don't bypass certificate validation, I'm not able to connect to that network. The only solution for me is to get the certificate that the server uses and install it on my phone.

My question is : How to find the certificate which my college network uses by connecting it to my laptop? Some said that ticking mark beside 'Validate server certificate' gives success but unfortunately my laptop is not connecting if I'm removing the tick mark.

So is there any way to find the certificate which my college wifi network uses?

PS : I can't contact the IT department for this for some reasons so, any answers other than this are greatly appreciated.