Domain member dns update not working

[Wolf, Stephan]

Hello,

We are using samba 4.9 on debian 10 as a domain member in a windows domain.
The debian machine is using DHCP. Even the machine gets a new IP from 
the DHCP server I have to update manually the dns entry by calling

net ads dns register-U <domain_user>
Is there a way to update the dns entry upon smbd is started? I know 
there is a way to do it as a DC but we are a domain member.

#> cat /etc/debian_version
10.0

#> smbcontrol --version
Version 4.9.5-Debian


Thx a lot,
Stephan