I am tasked with trying to implement wireless for a client using wpa2-enterprise tied in with Microsoft IAS. Everything I am reading so far points me to the requirement for using certificates. A lot of these computers will either be running out of the domain (kind of like guests) and will be a mix of operating systems. So to keep administration of end user computers down, I was trying to find a solution that either does not use certificates or only requires me to do something with the certificate on the head end (IAS). Is this possible?