What does Windows error code 9963 (DNS_ERROR_SCOPE_ALREADY_EXISTS) mean?

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: A DNS policy scope with the supplied name already exists.

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DNS_ERROR_SCOPE_LOCKED	DNS_ERROR_POLICY_ALREADY_EXISTS

DNS_ERROR_SCOPE_ALREADY_EXISTS

DNS_ERROR_SCOPE_ALREADY_EXISTS means the operation tried to create a duplicate policy scope. A scope can exist even when it is not currently used by an enabled policy.

What to verify

List existing scopes and policies before creating a replacement.
Check whether the existing scope is referenced by a disabled or staged policy.
Use a new name only when it represents a genuinely different response set or policy behavior.

Get-DnsServerQueryResolutionPolicy
Get-DnsServerQueryResolutionPolicy -ZoneName "example.com"
Get-DnsServerClientSubnet

Microsoft: Get-DnsServerQueryResolutionPolicy

Microsoft: Get-DnsServerZoneScope

Microsoft: DNS Policies overview

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