Ok, so I have it accepting logins now but the problem is it will accept ANY login so long as the username is from AD. I have entered the OpenLDAP query's as:
%u@domain.lan for postfix and %n@domain.lan for dovecot. This allows user@ANYNAME.COM to login successfully. I guess this is a semi-victory as I can now use my desired domain. Now I just need to restrict this to only allow the domain that I wish to use.
Any thoughts?