[Samba] Add New DNS Server

[basti]

Hello,
I have try to add a new DNS Server to a existing Samba AD with bind DLZ.
I have try
https://wiki.samba.org/index.php/DNS_Administration#Adding_new_records

A New NS Record is add, on the old DNS dig show the new NS entry but
that is not shown on the backup dns.

The backup DNS is youn to domain.
samba-tool drs showrepl looks good

Is there a command to join a new dns server to the samba ad?