When the NTLMv2 authentication requirements are turned on, both in the NT4 and also in the Samba domain, the inter-domain trust breaks. Steps to replicate: Setup NT4 Domain using a Windows NT4 Server, upgrade to SP6a (NTDOM) Enable NTLMv2 http://support.microsoft.com/kb/239869 Disable LanMan support http://support.microsoft.com/kb/147706 Setup Samba Domain using Samba 3.0.27, with winbindd enabled (SMBDOM) Enable the following items in smb.conf ntlm auth = no lanman auth = no client plaintext auth = no client lanman auth = no client ntlmv2 auth = yes client schannel = yes server schannel = yes client signing = auto server signing = auto Domain Trust fails in the check_ntlm_password routine.
sorry for the long period of silence here. do you have a chance to test with the latest 3.3 or the upcoming 3.4.3 release? There are numerous trust fixes in there.
ntlmv2 and trusts work these days.