samba - Feb 2020 - WERR_DNS_ERROR_NAME_DOES_NOT_EXIST when samba_dnsupdate tries to add to _msdcs

Ok, I'm moving on to Ubuntu 18.04 + Samba 4.11.6 + Bind 9.11.3
(thanks to the advice and the http://apt.van-belle.nl/ website)

I've also updated my Windows 2008 servers, moving _msdcs up to a new
Forest-level zone.
Hopefully, that will help.

I'm following the "howto" file from the van-belle website,
modified to JOIN as a member DC
rather than PROVISION a new standalone domain.

I'll post any new questions to the list under a new subject...

Thanks for the feedback!