sudo serveradmin settings smb:ntlm auth = "yes"If that doesn’t work (older and by older I mean old as hell versions of Windows), try Lanman:
sudo serveradmin settings smb:lanman auth = “yes"The second is that the authentication string (can be seen in wireshark) doesn’t include the workgroup/domain. To resolve this, simply include the Server name or workgroup in the beginning of the username followed by a backslash(\). So you might do this as a username if your NetBios name were kryptedserver:
kryptedserver\charlesTo get that exact name, use serveradmin again, to look at the smb:NetBIOSName attribute:
smb:NetBIOSName = "kryptedserver"
krypted November 4th, 2014