[Samba] Do users have to have accounts on a Samba server to map drives?

[Steve Blackwell]

I know this may be a very simple question but I cant seem to find the
answer in the O'Reilly Samba book or from Google.

When using Samba 2 (actual version 2.2.12) we had W2K domain users
authentication via the ADS to access Samba shares. The W2K users did not
actually have Unix accounts on the Samba server, we used the users.map
file to map the W2K account name to a guest Unix account. Running Samba 3
(actual version 3.0.14a) this process does not to seem to work the
following error message appears in the log files.

[2005/12/22 09:14:25, 2] lib/access.c:check_access(322)
  Allowed connection from  (172.26.178.164)
[2005/12/22 09:14:25, 0] auth/auth_util.c:make_server_info_info3(1195)
  make_server_info_info3: pdb_init_sam failed!
[2005/12/22 09:14:25, 2] auth/auth.c:check_ntlm_password(310)
  check_ntlm_password:  Authentication for user [darwin] -> [ftp] FAILED
with error NT_STATUS_NO_SUCH_USER
[2005/12/22 09:14:25, 2] smbd/sesssetup.c:setup_new_vc_session(608)
  setup_new_vc_session: New VC == 0, if NT4.x compatible we would close
all old
resources.
[2005/12/22 09:14:25, 2] smbd/sesssetup.c:setup_new_vc_session(608)
  setup_new_vc_session: New VC == 0, if NT4.x compatible we would close
all old
resources.
[2005/12/22 09:14:25, 0] auth/auth_util.c:make_server_info_info3(1195)
  make_server_info_info3: pdb_init_sam failed!
[2005/12/22 09:14:25, 2] auth/auth.c:check_ntlm_password(310)
  check_ntlm_password:  Authentication for user [darwin] -> [ftp] FAILED
with error NT_STATUS_NO_SUCH_USER
[2005/12/22 09:24:54, 2] smbd/server.c:exit_server(609)
  Closing connections


The only way I found to get the users to mount a Samba share is to create
a Unix account. I don't particularly want to create 600 Unix account for
users to access a couple of shares.

Does anyone know how to get Samba 3 to act the same as Samba 2?

Cheers

Steve