Class identifier %1 (class name %2) has an invalid relative distinguished name (RDN) attribute identifier %3. Class definition ignored.

Details
Product: Windows Operating System
Event ID: 1154
Source: Active Directory
Version: 5.0
Symbolic Name: DIRLOG_SCHEMA_INVALID_RDN
Message: Class identifier %1 (class name %2) has an invalid relative distinguished name (RDN) attribute identifier %3. Class definition ignored.
   
Explanation

The specified schema class has a relative distinguished name (RDN) attribute identifier that is not valid. The class definition is ignored.

   
User Action

Assign a valid RDN attribute identifier to the schema class.

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