MSCHAP2 PEAP +Win2012AD _ LDAP + FR

Before I spend time researching/configuring this (like I did several years ago, failed and joined the FR box to AD), I would love it if someone can tell me if this is doable now, some pointers on HOW would be great too if it is. I have a need to put together a freeradius box that can authenticate wireless users using MSCHAPv2 PEAP. I do not want to join the Linux box running FR to AD domain, I simply want to use LDAP and authenticate wireless users, the LDAP is really windows AD runing on server 2012. so is this a support config or must I join the FR Linux box to MS AD environment for this to work? Thanks,