Most of you reading this will already know what DNS Scavenging is. For those of you that don’t it is a feature of Windows DNS servers which allows you to automate the deletion (scavenge) of outdated DNS resource records. It sounds simple enough and it is once you decipher Microsoft’s cryptic descriptions, but to the uninitiated it is just plain confusing and often leads to unpredictable results. This article will attempt to simplify how DNS scavenging works. Enabling DNS Scavenging on Zones The first thing we need to do is enable Scavenging. This is done separately for each DNS zone.