About auth line that samba adds to common config I think following: if you want to use user authentification from samba users repository it must be in common-auth, but hardly someone uses this approach. I think the problem is not in wrong location samba auth string, but the problem in samba auth engine inplementation.
Once connecting via RDP configured to use xterm as window manager when I entered wrong login-password pair I was asked credentials by samba auth engine. That means that samba auth engine works, only works somehow strange.
To Jon Ogilvie...
About auth line that samba adds to common config I think following: if you want to use user authentification from samba users repository it must be in common-auth, but hardly someone uses this approach. I think the problem is not in wrong location samba auth string, but the problem in samba auth engine inplementation.
Once connecting via RDP configured to use xterm as window manager when I entered wrong login-password pair I was asked credentials by samba auth engine. That means that samba auth engine works, only works somehow strange.