[Samba-it] groupmap

[Andrea Bencini]

samba-3.0.23-1
Eseguo il comando
net groupmap modify ntgroup="Domain Admins" unixgroup=root
mi ritorna il messaggio
NT Group Domain Admins doesn't exist in mapping DB

Non so cosa fare!
Mi potete aiutare
grazie
Andrea

# Global parameters

[global]
workgroup = DOMINIO
netbios name = SRV
passdb backend = tdbsam
pam password change = Yes
passwd program = /usr/bin/passwd %u
passwd chat = *New*Password* %n\n *Re-enter*new*password*%n\n
*Password*changed*
username map = /etc/samba/smbusers
unix password sync = Yes
syslog = 0
max log size = 100
smb ports = 139
name resolve order = wins bcast hosts
time server = Yes
printcap name = CUPS
show add printer wizard = No
add user script = /usr/sbin/useradd -m '%u'
delete user script = /usr/sbin/userdel -r '%u'
add group script = /usr/sbin/groupadd '%g'
delete group script = /usr/sbin/groupdel '%g'
add user to group script = /usr/sbin/usermod -G '%g' '%u'
add machine script = /usr/sbin/useradd -s /bin/false -d /var/lib/nobody '%u'
logon path =
logon drive = R:
domain logons = Yes
preferred master = Yes
wins support = Yes
printing = cups
printcap name = /etc/printcap
os level = 35
domain master = Yes