[Samba] explorer.exe: no mapping between names and security ids was done

Rowland Penny rpenny at samba.org
Thu Aug 3 09:51:24 UTC 2017

On Thu, 3 Aug 2017 09:59:44 +0100
Bernie Elbourn via samba <samba at lists.samba.org> wrote:

> ... I just want to put this somewhere easily searchable based on the
> users error message.
> Upgrading a domain controller to Debian 8  (samba 3 to 4) resulted in
> the message "no mapping between names and security ids was done" at
> times. The message appears on the windows 7 domain pcs when running
> explorer.exe. Also other basic things did not work: internet
> explorer, or mapping between file types and extensions.  But only at
> times.
> The problem is apparent when running set in a command on the affected
> windows pc. Look for the USERDOMAIN variable somewhere at the bottom
> of the list. It is not set to the real domain name. In my case it was
> the name of the server before it became a domain controller. I
> suspect the system was hanging together due to netbios names - eek.
> Mostly and for years running Debian 7, and samba 3 this was
> accidentally reliable.
> A quick fix is possible on the samba domain controller:

Yes, but is this an NT4-style PDC or an AD DC ?

It is probably a PDC, if so, can I suggest that as you have upgraded the
OS, it might be a good idea to think about moving to Active Directory.


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