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STATUS_DS_ATTRIBUTE_TYPE_UNDEFINED
The request names an unknown attribute type
This status means the directory could not resolve the requested attribute type in the active schema. It is different from an existing attribute that is simply absent on the object.
The cause is often a schema extension mismatch, a misspelled LDAP display name, replication delay after extending the schema, or an application built for a newer schema than the forest currently exposes.
What to inspect
- Compare the attribute name with the schema
lDAPDisplayName, not only with friendly UI labels. - Check whether schema changes have replicated to the DC that processed the request.
- Verify that the forest schema version and optional product schema extensions match the application requirement.
References
- Microsoft: Active Directory schema
- LDAP schema model: RFC 4512
- Microsoft: AD replication concepts
- Microsoft Open Specifications: NTSTATUS values
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