Cisco ACS 4.1 and EDir

Hi

I contracted a company to put in a campus wide Wireless solution. They
installed a Cisco ACS 4.1 solution only problem is that the ACS won't
talk to EDIR through LDAP using MSchap v2 , they now feel that the only
solution is to put in AD. I have been holding out for another way and have
found out about EAP-TLS is there anyone out there using this as a solution
( as the company contracted claim there is not )

thanks