Question : Easy way to clean local DNS server of old data?

My local DNS server has entries in of computers that have been gone for a year now. Is there an easy way to clean it out without deleting the entries one by one?

Answer : Easy way to clean local DNS server of old data?

You can configure scavenging through a zone's properties.

1. Open the DNS console, right-click the zone, and choose Properties. 
2. On the General tab, click Aging to open the Zone Aging/Scavenging Properties dialog box. 
3. Set the Refresh Interval and the No-refresh Interval using the drop-down lists. 
4. Select the Scavenge Stale Resource Records check box, and click OK to close both dialog boxes.You can configure scavenging through a zone's properties.
   Open the DNS console, right-click the zone, and choose Properties.
   On the General tab, click Aging to open the Zone Aging/Scavenging Properties dialog box.
   Set the Refresh Interval and the No-refresh Interval using the drop-down lists.
   Select the Scavenge Stale Resource Records check box, and click OK to close both dialog boxes. 

or for zones globally by editing the server's properties. In the DNS console, right-click the server, and choose Set Aging/Scavenging For All Zones. The resulting dialog box is the same as that for an individual zone.