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DNS Scavenging

Scavenging is a feature that will remove expired records based on their time stamps.
Scavenging is not enabled by default.
Scavenging will NOT remove statically configured records, the ones you manually create unless you run dnscmd /AgeAllRecords, which will stamp them making them eligible for scavenging (more below on this). Without running this command, DNS will scavenge dynamically updated records that have reached their time stamp. To look at the time stamps of a record using Windows 2003 DNS, put the DNS console “view” in the menu to Advanced View, then look at the individual record properties, and you will see the time stamp. If using Windows 2008 or or newer, it will show up in the console as a separate column.

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