The DNS server has detected that the secondary zone %1 has no master IP addresses in registry data. Secondary zones require at least one master server to act as a source. You can add or update the IP address for the master server for this zone using the DNS console. For more information, see “To update the master server for a secondary zone” in the online Help.

Details
Product: Windows Operating System
Event ID: 503
Source: DNS
Version: 5.0
Symbolic Name: DNS_EVENT_SECONDARY_REQUIRES_MASTERS
Message: The DNS server has detected that the secondary zone %1 has no master IP addresses in registry data. Secondary zones require at least one master server to act as a source. You can add or update the IP address for the master server for this zone using the DNS console. For more information, see “To update the master server for a secondary zone” in the online Help.
   
Explanation

When defining secondary zones, an IP address must be configured for the master server from which the zone information is obtained during startup or when the refresh interval times out in the SOA record.

   
User Action

Verify that the master IP address of the secondary zone has been defined on the server:

1. In DNS Manager, right-click the specified secondary zone file, and then click Properties.
2. Verify that the primary server IP address is defined in the IP Masters address list. If the primary server IP address is missing, add it to the list.
3. If the IP address is defined, delete it and then add it back to the IP Masters address list.
4. Click OK.
5. Click DNS on the menu bar, and then click Update Server Data Files.

Check the registry to verify that the primary server IP address has been added to the zone directory:

1. Click Start, and then click Run.
2. Start a registry editor (Regedit.exe or regedt32.exe).
3. Open the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DNS\Zones subkey.
4. Click the specified zone name in the left pane, and then click Delete.
5. Click the secondary zone file specified in the error message.
6. Verify that the MasterServers entry has an IP address assigned to it. The value of this entry is in hexadecimal format. For example: 01 00 00 00 9d 39 79 57. You can convert the last four sets of numbers in the hexadecimal value to a decimal value to obtain the IP address entered in the IP Masters list.

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