What does Windows error code 9925 (DNS_ERROR_DEFAULT_VIRTUALIZATION_INSTANCE) mean?

 
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DNS_ERROR_INVAILD_VIRTUALIZATION_INSTANCE_NAME DNS_ERROR_ZONESCOPE_ALREADY_EXISTS

DNS_ERROR_DEFAULT_VIRTUALIZATION_INSTANCE

The default virtualization instance is not a normal tenant container

Windows DNS exposes a default virtualization instance that is functionally equivalent to the standard non-virtualized DNS server context. Microsoft PowerShell documentation shows the default instance represented by a period and lists it alongside named virtualization instances. The default container is foundational server state rather than a user-created instance with an ordinary lifecycle.

Check whether automation accidentally resolved an empty, default, or period identifier when it intended a named instance. Manage zones in the default instance through ordinary zone operations, and create a separate named virtualization instance when tenant isolation is required. Do not attempt to delete and recreate the default instance as a way to reset DNS Server configuration.

What to inspect

  • Enumerate virtualization instances and identify the entry whose friendly name is Default.
  • Trace how the management client selected the instance identifier.
  • Use zone operations for the default context or provision a distinct named instance for isolated zone trees.

References


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