Unique identifier for a directory object. The semantics of uniqueness are defined locally for the directory, so the values are not necessarily universally unique identifiers, but might be a payroll number for an individual or a department code for an organizational unit.

Origin RFC 4524
Usage userApplications
OID 0.9.2342.19200300.100.1.44
Substring Matching Rule caseIgnoreSubstringsMatch
Equality Matching Rule caseIgnoreMatch
Single Value false: multiple values allowed
Names uniqueIdentifier
Ordering Matching Rule caseIgnoreOrderingMatch
User Modification Allowed true
Used By pilotObject
Schema File 00-core.ldif
Syntax Directory String
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