What does Windows error code 9902 (DNS_ERROR_DP_ALREADY_EXISTS) mean?

 
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DNS_ERROR_DP_DOES_NOT_EXIST DNS_ERROR_DP_NOT_ENLISTED

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


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