System Administration Guide: Naming and Directory Services (DNS, NIS, and LDAP)

enableShadowUpdate Switch

If the enableShadowUpdate switch is set to true on the client, the admin credentials will be used to update the shadow data. Shadow data is stored in the shadowAccount object class on the directory server. Admin credentials are defined by the values of the adminDN and adminPassword attributes, as described in Local Client Attributes. These admin credentials are not used for any other purpose.

Admin credentials have properties similar to Proxy credentials. The exception is that for admin credentials, the user must have all privileges for the zone or have an effective UID of root to read or update the shadow data. Admin credentials can be assigned to any entry that is allowed to bind to the directory. However, do not use the same directory manager identity (cn=Directory Manager) of the LDAP server.

This entry with admin credentials must have sufficient access to read and write the shadow data in the directory. Because the entry is a shared-per-system resource, the adminDN and adminPassword attributes must be configured on every client. The encrypted adminPassword is stored locally on the client. The password uses the same authentication methods that are configured for the client. The admin credentials are used by all users and processes on a given system to read and update the shadow data.