We have a client with a multihomed Windows 2008 R2 file server who's AD DNS A record is changing at 16:10 every day.
The checkbox 'Register this connection's address in DNS' is not checked.
I've run debug logging on both AD DNS servers and confirmed the DNS update is coming from the file server.
Multihomed is required for HA and load balancing the LAN.
I should add that this box is part of a HA pair but the HA software, Neverfail, shows no sign at all that it's changing the A record. The IP it's changing to is not the secondary HA IP but a subnet for the backups traffic.
Any ideas or suggestions?