You are right, know I tried with IP from samba container:
Starting Nmap 6.40 ( http://nmap.org ) at 2018-05-17 08:47 CEST
Nmap scan report for 192.168.46.6
Host is up (0.00096s latency).
All 1000 scanned ports on 192.168.46.6 are filtered
MAC Address: B2:C1:65:74:D9:AC (Unknown)
Nmap done: 1 IP address (1 host up) scanned in 27.42 seconds
Errors are shown, at the moment I try to bind to an nethserver ad.
I can ping the ad server by FQDN and by server IP, but not by samba IP