In EDirectory the groupMemberShip value is the DN of an entry that the current entry is a member and is referred to as a Forward Reference.

In EDirectory there is a reciprocal attribute on the entry represented by the securityEquals value of member as described in Groups Edirectory page.

The equivalentToMe value is used to allow rights with the NDS Tree to be evaluated to determine who has equivalent rights to the group. In pure LDAP environment, where rights are not required within the Tree, this is optional.

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