samba - May 2015 - BIND9 w/ Samba4 DLZ - 'not authoritative' msg in log

Hello,

 

I am receiving messages in named.log that say:

 

notify: notice: client [IP]#61125: received notify for zone
'_msdcs.[DOM].[COM]': not authoritative

 

The [IP] is that of a different internal DNS server(s).

 

Everything appears to be working correctly, including DNS, but I am just
wondering why the messages saying "not authoritative" - shouldn't
this DNS
server be authoritative for all internal DNS zones?

 

The line "auth-nxdomain yes;" is present in named.conf.

 

Linux DC is running Ubuntu Server 12.04.5 LTS w/ Samba v4.2.1 and BIND
v9.8.6

 

Other DNS servers are running Windows Server 2008R2.

 

Thank you for any help!

 

David