This setting does not trigger any deletion, it is merely a method that DNS uses to check the time stamp of the records, to determine whether to mark them updating stale or not.
Our network users mostly use laptops, we have a few hundred of them. As this option does not work, server only leaves scavenging to clean up the mess.
So fast scavenging of records is paramount when considering they travel interstate between branches and connect to a VPN solutioon that issues addresses from a different subnet. I would appreciate dhcp you can look up that Microsoft ticket.
This is VERY crucial to dna setup right, or updating end dns with DNS records that are completely out of whack, and behavior that is dns inexplicable.
Take a look at what you have there for now, and server you this may even be an issue, I'll try to see if I can pull back up that ticket I had open for any server I may have on scavenging.