[Samba] problem connecting to shares from Win7 clients - invalid NTLMSSP_MIC

[Sonic]

On Thu, Nov 17, 2016 at 3:00 AM, Christian Naumer via samba
<samba at lists.samba.org> wrote:
> https://bugzilla.samba.org/show_bug.cgi?id=12303
>
> client ipc signing = No

I saw that bug but it's a bit different then what I see, as smbclient
connections from 'nix systems always work.

I'm already running "client ipc signing = No" as that was necessary to
join the domain.

Oddly enough once a user starts having the problem any user from that
system has the problem. IOW logging onto the problem users system as a
domain admin will still not connect to the 4.5.x server, although can
still connect to all other samba and windows systems.

Also after restarting the services (nmbd winbind smbd) the problem
goes away, but eventually does return (not tied to any particular
Windows system).

Thanks,

Chris