After importing the certificate to the keystore, then try to create the OS/400 endpoint the following error is displayed in the jcs_daily.log
[ApacheDS Worker-thread-169] (:com.ca.commons.jndi.pool.ConnectionPool:64) ERROR - ConnectionPool [com.ca.jcs.as400.AS400ConnectionFactory@1926baf4: 0/4 idle, 0/10 active]: problem borrowing connection
javax.net.ssl.SSLHandshakeException: Received fatal alert: no_certificate
at sun.security.ssl.Alerts.getSSLException(Unknown Source)[:1.8.0_60]
Identity Manager 14.x
In the java.security file the ciphers below were disabled, after removing it and restarting the JCS the connection worked fine.
From the document below, in the java.security file, remove the ECDH and ECDHE ciphers
See, this section of the documentation look for the heading "Platform Level TLS Protocol Setting for JCS"