Access the Server Manager and choose the Java tab.
Click External JNDI Resources.
Click the New button.
Enter the following information:
JNDI Name (required). Enter the JNDI name that application components must use to access the custom resource.
Resource Type (required). Enter the fully qualified type of the custom resource.
Factory Class (required). Enter the fully qualified name of the user-written factory class, which implements javax.naming.spi.ObjectFactory.
JNDI Lookup (required). Enter the JNDI value to look up in the external repository. For example, if you are creating an external resource to connect to an external repository, to test a mail class, your JNDI Lookup could read cn=testmail.
External Resource Enabled (optional). Select On to enable the external resource at runtime.
Click Apply Changes.