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DNS_ERROR_DP_ALREADY_EXISTS
The DNS directory partition has already been created
Creating a DNS application directory partition is a directory lifecycle operation. MS-DNSP requires the server to poll directory partition and enlistment state, check the local Application Directory Partition Table, and create a domainDNS object only when the requested partition is absent. A duplicate create is rejected before a second partition can represent the same namespace.
Inspect the existing partition, its cross-reference metadata, and which DNS servers are enlisted. If the real goal is to host a zone in that replication scope, use the existing partition or move the zone to it. If the server does not appear enlisted, that is a separate enlistment issue and should not be solved by trying to recreate the partition under the same name.
What to inspect
- Enumerate the current application directory partitions and their DNS names.
- Determine whether the desired operation is partition creation, server enlistment, or zone placement.
- Reuse the existing partition when its replication scope matches the intended DNS design.
References
- MS-DNSP: DNS Server management operations
- MS-DNSP: zone and application directory partition management structures
- Microsoft: Active Directory-integrated DNS zones
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