ERROR_DS_ATTRIBUTE_TYPE_UNDEFINED: meaning and diagnosis

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: ERROR_DS_ATTRIBUTE_TYPE_UNDEFINED means the requested directory-service attribute type is not defined in the schema.

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ERROR_DS_ATTRIBUTE_TYPE_UNDEFINED

ERROR_DS_ATTRIBUTE_TYPE_UNDEFINED (0x0000200C) is an Active Directory Domain Services LDAP result. The client referenced an attribute that is not defined in the schema visible to the directory service.

Check the attribute name or OID against the schema visible on the contacted domain controller. Schema replication lag, a typo, or use of an extension not installed in this forest can all produce the same client-facing result.

What to check

Confirm the LDAP attribute name, including any application-specific schema extension.
Verify that schema changes replicated to the domain controller handling the request.
Make sure the client is querying the intended directory partition and not a different forest or AD LDS instance.

Useful command

Get-ADRootDSE -Server "<dc-fqdn>"

Microsoft: AD DS LDAP operations · Microsoft: AD DS diagnostic logging · Microsoft: Get-ADObject

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