[Samba] bind-dns folder permissions with bind-dlz configuration 4.10

[Trenta sis]

Hi,

While upgrading samba 4.4 to samba 4.10 I have detected taht with
newer versions if you use bind-dlx config it seem that is not working
by a permissions problems on new folder bind-dns on samba folder,
If you change to 777 to this folder and named.conf  then works, but is
not secure...
I have checked samba wiki and no information about this

Any suggestion what could be the right configuration?

Thanks