[Samba] Upgrading samba from jessie (4.2) to stretch (4.5) in AD mode...

[gimili17 at gmail.com]

It seems to be working now.  I think something I did below solved the issue.

I tweaked my /etc/network/interfaces as per below and removed the kerberos server:
This was originally here: https://lists.samba.org/archive/samba/2015-February/189147.html.
>/# The loopback network interface />/auto lo />/iface lo inet loopback///>/# The primary network interface />/auto eth0 />/iface eth0 inet static />/address 192.168.121.149 />/netmask 255.255.255.0 />/gateway 192.168.121.1 />/network 192.168.121.0 />/broadcast 192.168.121.255 />/domain smbdomain.com />/dns-nameservers 127.0.0.1 192.168.121.1///>/Any suggestions? Thanks so much./
>>Yep, 'apt-get purge krb5-kdc krb5-admin-server'
>>The kerberos server is built into the samba AD DC
>>Rowland


I also did this:
Info. from https://www.server-world.info/en/note?os=Debian_9&p=samba&f=4
systemctl stop smbd nmbd winbind
systemctl disable smbd nmbd winbind
systemctl unmask samba-ad-dc
systemctl start samba-ad-dc
systemctl enable samba-ad-dc

I doubt this helped but I did this also:
apt remove avahi-daemon