| Event Id | 1143 |
| Source | Active Directory |
| Description | Class identifier %1 (class name %2) has non-auxiliary class identifier %3 (class name %4) listed as an auxiliary class. Auxiliary class ignored. |
| Event Information | The schema class has a non-auxiliary class incorrectly listed as an auxiliary class. The non-auxiliary class will be ignored. No user action is required. |
| Reference Links | Monitoring AD Changes: Article |
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