From the Administration Server interface, access the server instance you want to manage, then click on the Java tab.
Click Security Realms.
By default, the following realms are provided:
To add a realm, click New. To delete a realm, check the checkbox next to the name of the realm, and click OK. To edit a realm, click on the name of the realm.
If you are adding or editing a realm, enter the realm’s name, classname, properties, and users (file realm only).