[Samba] PTR records not generating with secure updates

[James]

Hello,

    Enabling 'allow dns updates = nonsecure' in smb.conf allows for PTR
records to populate their respective reverse zone. If I set 'allow dns
updates = secure' they do not. Samba log file yields no results as far
as I can tell. I would like to remain in the Samba eco system for DNS.
Thoughts? I'm currently using Samba internal DNS with Samba 4.2.3. Thanks.

-- 
-James