[Samba] Samba 4.3 AD Member Server: No Domain configured for <hostname>

[Viktor Trojanovic]

After setting up a Samba AD Member Server following the instructions on 
the Samba Wiki, I am running into some issues. I checked the net for 
hints, including the list archive, and indeed my issues are mentioned in 
many places but never accompanied by a working solution.

I will focus on one point for now. When joining my member server to the 
DC, I see the following output in the shell:

     # net ads join -U administrator
     Using short domain name -- SAM
     Joined 'HOSTNAME' to dns domain 'sam.domain.com'
     No DNS domain configured for hostname. Unable to perform DNS Update.
     DNS Update failed: NT_STATUS_INVALID_PARAMETER

If I check the domain attached computers with RSAT, this host is listed 
but with an arrow pointing down (afaik a sign for 'disabled').

I did all the various checks suggested on the wiki page, such as using 
'host', 'ldbsearch', 'kinit' and so on. They all return the respective 
recommended values. But let me know if some specific output would help, 
happy to provide it.

var/log/messages mentions only CUPS errors. I am not sure if this is 
relevant since I don't even need CUPS (how can I avoid these errors?).

Is this DNS error a relevant error at all? If yes, does anyone know how 
it could come to this error?

I am not sure if this is relevant information but there is no DNS record 
for the member server on the DC. It's also nowhere mentioned that this 
is necessary.