First, I want to thank rickyjones for making this guide that's just work. I think you should have included roaming profile and home share settings in your guide though. Well, I managed to figure out that part anyway, so it's all good.

As for the one above me, you should have used the forum as asked to but oh well: you have to add your admin DN and password into LDAP server configuration in LDAP server module of webmin for it to work.