---
title: uniqueMember
description: Distinguished names of objects that are part of a group, where the RDN of the object includes a value to distinguish between names that have been reused.
component: pingds
version: 8.1
page_id: pingds:schemaref:at-uniqueMember
canonical_url: https://docs.pingidentity.com/pingds/8.1/schemaref/at-uniqueMember.html
---

# uniqueMember

Distinguished names of objects that are part of a group, where the RDN of the object includes a value to distinguish between names that have been reused.

|                             |                                                                |
| --------------------------- | -------------------------------------------------------------- |
| *OID*                       | 2.5.4.50                                                       |
| *Names*                     | uniqueMember                                                   |
| *Syntax*                    | [NameandOptionalUID](s-NameandOptionalUID.html)                |
| *Equality matching rule*    | [uniqueMemberMatch](mr-uniqueMemberMatch.html)                 |
| *Substring matching rule*   | [caseIgnoreSubstringsMatch](mr-caseIgnoreSubstringsMatch.html) |
| *Single value*              | false: multiple values allowed                                 |
| *User modification allowed* | true                                                           |
| *Usage*                     | userApplications                                               |
| *Origin*                    | [RFC 4519](https://datatracker.ietf.org/doc/html/rfc4519)      |
| *Schema file*               | 00-core.ldif                                                   |
| *Used by*                   | [groupOfUniqueNames](oc-groupOfUniqueNames.html)               |