LDAP Synchronization

Hi Guys,

I'm trying to sync CUCM7 with my AD domain and I have succesfully got it to sync by pulling users but I would like to have it sync just users within a group. I have tried everything I can and am at a loss. Under LDAP search base I have: cn=users, dc=lab, dc=local and so far that will let me sync all users but that's not what I'm looking to do.