[Samba] Samba 4.10.7 question with external DNS Server

[Maurizio Caloro]

Hello Together
Please i have here a little company with any exisiting internal DNS Server 
"BIND 9.11.5-P4-5.1-Debian (Extended Support Version) <id:998753c>"

Today i compilled the release Samba 4.10.7 successfully on any new machine 
here..... 

i read on Samba org the following News.
        - Do not use the BIND9_FLATFILE DNS back end. It is not supported 
and will be removed in the future

Please arn't possible to make any bind from AD to a exisiting DNS Server?

Best regards
Mauri