ERROR_DS_WRONG_OM_OBJ_CLASS - 8476 (0x211C)
The OM-Object-Class specified is incorrect for an attribute with the specified syntax.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_DS_WRONG_OM_OBJ_CLASS error indicates that the Object Manager (OM) object class specified for an attribute does not match the expected syntax or type. This typically occurs in scenarios involving directory service operations, where the object class is incorrectly defined.
Error Details
This error code is specific to situations where a particular attribute's syntax requires a certain object class, but the provided object class does not align with this requirement. For example, if an attribute expects a person object class, but a group object class is specified, this error will be returned.
Usage Context
This error can occur in various directory service operations where object classes are involved, such as adding or modifying attributes within Active Directory or other LDAP-based systems. It highlights an issue with the attribute's definition and the associated object class.
Developer Interpretation
When encountering this error, developers should ensure that the correct object class is being used for each attribute. This involves verifying the attribute schema and ensuring that the object classes specified match those defined in the directory service schema.
Related Errors
ERROR_DS_ATT_NOT_DEF_IN_SCHEMA(0x2104): The attribute is not defined in the schema.ERROR_DS_CANT_MOD_ATT(0x2103): The attribute cannot be modified due to its definition or usage constraints.
FAQ
Q: What does the ERROR_DS_WRONG_OM_OBJ_CLASS error mean?
A: It indicates that the object class specified for an attribute is incorrect and does not match the expected syntax or type.
Q: How can I resolve this error?
A: Ensure that the correct object class is used for each attribute according to the schema definition in your directory service.
Summary
The ERROR_DS_WRONG_OM_OBJ_CLASS error highlights an issue with the object class specified for a particular attribute. Developers should verify the attribute's schema and ensure that the object classes match those defined within the system.