If I wanted to build a trust between a Samba 4 (4.6.0) domain, and a Windows Server 2008 R2 SP1 domain, what steps would I need to take? I need Windows to trust the Samba domain, so that Samba users can access Windows resources. I've built both domains in a lab and both are able to resolve each other through DNS. I was also able to join a Windows 7 machine to the Samba domain and log in as a Samba user. What I'm having trouble with is figuring out how to create the trust because I'm not finding much documentation on that. I see that in version 4.3 (IIRC) samba-tool got new subcommands for managing trusts, but when I try to add the trust using "samba-tool domain trust create windows.local" I get an error saying "ERROR: REMOTE_DC[WIN-DC.windows.local]: failed to connect lsa server - ERROR(0xC000018C) - Trusted domain failure" after typing in the password for the trust that I set when I set up the Windows side of the trust. If I type the wrong password it prompts me for the password again and if I type it wrong 3 times then it gives me an error about logon failure, so that sort of proves that it is at least talking to the Windows server. Any help on this would be greatly appreciated!