Comment # 8 on bug 944866 from Bruno Friedmann

Sorry David, it will take time to get the tcpdump (if you want specific flags
and options don't hesitate to bring them here), I've been overloaded by other
stuf.

As most of those server are production, I've to wait week-end to do debuging.

I was pretty sure that win7+ doesn't resolve but this is not true.
I've a 42.2 openSUSE server which give this kind of results

Samba version 4.2.4-24.1-3722-SUSE-SLE_12-x86_64
PID     Username      Group         Machine            Protocol Version       
------------------------------------------------------------------------------
24132   A             ntdomusers    10.10.10.132 (ipv4:10.10.10.132:51782) NT1
XP32

3147    B            F-users      epicea       (ipv4:10.10.10.136:51053)
SMB2_10   WIN7 64 bit

757     C            ntdomadmin    ssgmt-note   (ipv4:10.10.10.194:60388)
SMB2_10     
(Windows 10 notebook)

It seems this is perhaps the most interesting one network.

I should have time to do a test during Feb 11-12th.