[Samba] Using groups with windows

[A.Dura]

Hi,

we are using samba with ldap for our pdc.

And i was told by another admin, that when you use a windows server, you 
can only get the "Domain Users" and "Domain Admins" groups from the 
samba/ldap pdc.

So i tried to add a group, which i know exists on the server, to my 
windows server, but windows couldn't find it.

Is there a way to make other groups then "domain users" and "domain 
admins" usable under windows?

Regards,
adura