ldap/krb5 auth and access point Authentication methods ?

[FM]

Hello,
We are using openldap/kerberos (MIT) and just bought  2 CISCO Aironet 1250.

I'd like to use freeradius to auth. our users. I read that freeradius
can use openldap and kerberos, so i suppose I will setup these for auth.

Most of my Wi-Fi users will be Windows/Mac Os and I'd like to avoid
custom installation on the laptops.

The question is :
Which auth method should I use on the access points ?

tx !