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ERROR_DS_NONEXISTENT_POSS_SUP
possSuperiors contains an unresolved class reference
Possible-superior lists define where instances of a structural class may be placed in the directory tree. MS-ADTS requires every class referenced by possSuperiors or systemPossSuperiors to exist and be active. This error means the class update contains a parent-class dependency that the schema cannot resolve.
Check whether the superior is part of the same schema extension and whether import order created the child class first. Also compare the identifier with the actual schema class name or OID used by the LDIF. A missing container object in the domain is not the cause; the failure is in the schema definition of the superior class itself.
What to inspect
- Resolve each possible-superior reference in the schema NC.
- Verify the superior class is active and has a valid structural category.
- Correct schema dependency order before creating directory instances.
References
- MS-ADTS: schema consistency checks
- Microsoft: classSchema class
- IETF RFC 4512: LDAP directory models and schema
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