Adding Ubuntu as a client in LDAP on RHEL

Hi All,

 Hope you guys are doing fine. Guys I am facing a problem. I am sharing with you.

I have implemented LDAP + SAMBA on RHEL for PDC (Primary Domain Controller). Its working fine. My windows workstations are authenticating with servers. Also my Linux clients (Red Hat and CentOS's) are authenticating and working fine. I thought My Ubuntu;s will be able to join on that domain But while adding Ubuntu its not adding.

My question:

1. will it work under my LDAP PDC as Centos / Red Hat are working.

2. Do I need / configure any 3rd party tools which will act like a middle man to authenticate Ubuntu for joining to that domian.

I hope I will get response from the tech lovers.

Thanks