I use Samba4.5.1 with ad server in Windows 2008, and mount the share by another 2008 server with an account in ad. It failed with password error. my smb.conf: [global] netbios name=zone1 security=ads realm=cnas.com workgroup=CNAS winbind separator=/ winbind use default domain=yes winbind enum users=yes winbind enum groups=yes idmap config * : backend=tdb idmap config * : range=100000-200000 [share01] path=/mnt/nfs/share01/ ....... I have tested Samba4.1.23 with the same smb.conf, and it works.