samba - Jun 2012 - Samba4 AD Server auth. with Win2k8R2 Server

Hello,

I want to set up a Samba 4 AD server that authenticates
username/password against Windows 2008 R2 Server. The users of the
Samba domain will be logging to machines in Samba domain but their
credentials would be passed to the Windows AD server for
authentication (in a similar fashion as Samba file server
authenticates against Windows AD server).

In other words, I want Samba AD server to be AD server for computer
accounts but act as a "pass-through" authentication server for users
logins. As for users permissions etc it is irrelevant where those
reside. I.e., I would not mind having one (Windows only) or two (Samba
 and Windows servers) sets of users accounts; as long as the user
authentication is done by the Windows server, my requirements are met.

The above would be the primary preference; if that is not possible,
alternative solution would be syncing usernames/passwords between
Samba and Windows servers and Samba domain users authenticating
against Samba server.

Hope the question is clear enough. Thanks in advance.

Alex