The DNS server has completed a scavenging cycle but no nodes were visited. Possible causes of this condition include: 1) ...

The DNS server has completed a scavenging cycle but no nodes were visited. Possible causes of this condition include: 
 
  1) No zones are configured for scavenging by this server. 
  2) A scavenging cycle was performed within the last %1 minutes. 
  3) An error occurred during scavenging. 
 
The next scavenging cycle is scheduled to run in %2 hours. 
 
The event data will contain the error code if there was an error during the scavenging cycle.