i m looking for a tutorial on the integration of External LDAP AD 2008 Server for MAC Address Authentication.
I'm having the same issue and found this article.
Unfortunately we are running 2008r2, so it looks like we may be SOL. I've got a ticket with Juniper open, so we'll see if there has been any solutions...
In the Admin Guide for Juniper UAC 3.1, there's a Use Case on page 156: Using an External LDAP Server for MAC Address Authentication. Have you tried following those instructions?
We are currently using an LDAP server for MAC Address Authentication. It's a Sun LDAP server but the configuration should be similar for AD 2008. You just need to store the MAC address somewhere in the AD tree. We use the objectClass ieee802Device to store hosts with their MAC address.