https://bugs.winehq.org/show_bug.cgi?id=35965
--- Comment #9 from Dmitry Timoshkov dmitry@baikal.ru --- (In reply to Dmitry Timoshkov from comment #8)
It looks like in order to have ntlm_auth from samba4 working one needs to setup a fully configured samba config, and default configuration (smb.conf) doesn't work.
Although http://wiki.winehq.org/NtlmAuthSetupGuide claims that client mode doesn't require a working samba configuration.