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2.40 Attribute objectClass

This attribute specifies the list of classes of which this object is an instance. See [MS-ADTS] section 3.1.1.2.4.3 for information about how this attribute is used.

 cn: Object-Class
 ldapDisplayName: objectClass
 attributeId: 2.5.4.0
 attributeSyntax: 2.5.5.2
 omSyntax: 6
 isSingleValued: FALSE
 schemaIdGuid: bf9679e5-0de6-11d0-a285-00aa003049e2
 systemOnly: TRUE
 searchFlags: fATTINDEX | fPRESERVEONDELETE
 attributeSecurityGuid: e48d0154-bcf8-11d1-8702-00c04fb96050
 isMemberOfPartialAttributeSet: TRUE
 systemFlags: FLAG_SCHEMA_BASE_OBJECT | 
  FLAG_ATTR_REQ_PARTIAL_SET_MEMBER
 schemaFlagsEx: FLAG_ATTR_IS_CRITICAL

Note If the DC functional level of the DC that initially created the forest is greater than or equal to DS_BEHAVIOR_WIN2008, then the fATTINDEX bit is present by default in the searchFlags attribute of the objectClass attribute; otherwise it is not present by default.

Version-Specific Behavior: Implemented on Windows 2000 Server operating system, Windows Server 2003 operating system, Windows Server 2003 R2 operating system, Windows Server 2008 operating system, Windows Server 2008 R2 operating system, Windows Server 2012 operating system, Windows Server 2012 R2 operating system, and Windows Server 2016 Technical Preview operating system.

The schemaFlagsEx attribute was added to this attribute definition in Windows Server 2008.

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