External realm name
Use this page to add a WebSphere Application Server realm that is external to this cell. The realm is initially not trusted. Use the Trusted authentication realms - inbound page to establish trust.
From the admin console, click...
Security > Security domains > domain > Security Attributes > User realm > Customize for this domain > Realm type > Configure > Related items > Trusted authentication realms - inbound or Trusted authentication realms - outbound. > Add External Realm
External realm name
Use to specify the name of the realm that is external to the list of realms available to receive trust.