[Samba] samba and AD integration, Two questions

[Taylor Lewick]

Hi all.  I've set up a test SuSe 10.2 linux machine that is
authenticating against our active directory.  Right now we just create
users in AD, and then they can login to the unix box and using
pam_mkhomedir.  We don't add users to the /etc/passwd file, in fact, if
you try and add a user using useradd -m once they've been setup in AD,
you get a message saying account already exists.

So Kerberos, AD, Samba, PAM and Winbind are all working. 

Right now, if a user logins to the linux box for the first time using
ssh, it creates their home directory.  Perfect.

But I do have two questions.

If they login to the box by mounting the samba share via windows, i.e.
\\servername\share two directories are created.  One for their AD
username, and one for the machine name of their PC.  Its not a big deal,
but is there a way to disable or stop it from creating the machine name
directory?  We won't ever use that directory.

Second, if for any reason we did lose connectivity to our domain
controllers, no one could login to the Linux box since there are no
accounts in /etc/passwd.  So is there a way to set it up so that if the
linux machine can't talk to the domain controller, then someone could
still login to the box?

Thanks in advance for help with these issues.

Taylor