[Samba] is samba ad dc the domain and local master browser ?

[niya levi]

hi everyone
should my samba 4 ad dc be configured as the local and domain master browser
or does this not apply to ad dc ?
i ask because using the following command
nmblookup -M MYNETBIOSNAME
and got a positive name query response from a domain member not the dc,
i disabled the domain and local browsing on the domain member
reran the nmblookup command,
and got a name_query failed to find name response,
i've seen examples for samba pdc but nothing for a ad dc.
so i'm looking for clarification on the the issue.
shadrock