If you have z/OS® running in your setup, you have the option of using a z/OS LDAP server with an SDBM backend. SDBM provides native authentication on z/OS with RACF®. This task is optional and should be performed by your z/OS security administrator.
Use a non-expiring password for the BDN user ID to prevent the WebSphere cell from halting because of internal authentication and authorization failures.
If your organization's policies require this category of user IDs to expire, ensure that you have a process in place to change the BDN password before it expires.