| Event Id | 1142 |
| Source | Active Directory |
| Description | Class identifier %1 (class name %2) has an invalid auxiliary class %3.Auxiliary class ignored. |
| Event Information | The auxiliary class identifier for the specified schema class is not valid. It is pointing to a class that does not exist, and the auxiliary class will be ignored. Delete the auxiliary class or point the identifier to an existing class. |
| Reference Links | Monitoring AD Changes: Article |
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