| Previous | Next |
| DNS_ERROR_SOA_DELETE_INVALID | DNS_ERROR_ZONE_REQUIRES_MASTER_IP |
DNS_ERROR_FORWARDER_ALREADY_EXISTS
The conditional-forwarding namespace is already defined
Windows DNS distinguishes server-wide forwarders from conditional forwarding for specific domain names. A conditional forwarder associates a DNS suffix with upstream servers that should resolve names in that namespace. Creating another forwarding zone for the identical suffix would create competing configuration at the same forwarding boundary.
Enumerate the existing conditional forwarder and compare its master server addresses, replication scope, and timeout behavior with the requested configuration. If the upstream set needs to change, update the existing forwarder rather than creating a duplicate. Also check whether the name is already hosted as an authoritative zone, because forwarding and authority are different resolution roles.
What to inspect
- Search existing zones and conditional forwarders for the exact DNS suffix.
- Compare upstream server lists and replication settings with the desired configuration.
- Modify the existing conditional forwarder when only its targets or properties need to change.
References
- Microsoft: DNS forwarding, conditional forwarding, and root hints
- Microsoft: DNS zone types and zone transfer behavior
- Microsoft: Get-DnsServerZone and zone state properties
Looking for a different code? Search another status or error code.