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Event ID: 500 Source: DNS

Source
Level
Description
The DNS server has detected that the zone 0.in-addr.arpa has invalid or corrupted registry data. To correct the problem, you can delete the applicable zone subkey, located under DNS server parameters in the Windows 2000 registry. You can then recreate the zone using the DNS console. For more information, see "Tuning advanced server parameters" and "Add and Remove Zones" in the online Help.
Comments
 
As per Microsoft: "The Notify option may have been used on one or more of the automatically created zones. This occurs if an IP address is specified in the zone properties or the Only Allow Access from Secondaries Included on Notify List option is enabled". See ME256318 to solve this problem.

See MSW2KDB to find out how to delete the zone from the registry.
To resolve this problem, obtain the latest service pack for Windows 2000. See ME316259 for more details.

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