[Samba] NT_STATUS_NOT_IMPLEMENTED

[lejeczek]

Hi guys.

In hope that some experts may read this, I'd like to ask - 
what below is or might be a symptom of?

....
[2021/03/13 15:27:36.643824,?? 1, pid=6248] 
../../source3/auth/check_samsec.c:454(check_sam_security)
 ?? Failed to modify entry: NT_STATUS_NOT_IMPLEMENTED
...

This happens when 'smbclient' tries to -L //server.some.dom 
and fails.
samba-4.13.4-1.el8.x86_64

many thanks, L.