Thank you, Evgeny, for pointing out how to update user(s) by using CPF Merge. I still like to have an option to configure a group of users in a single file and import this group of users with their passwords into several different IRIS instances which may use different CFP Merge files already. If there is a change to my users, I just update the XML file which gets imported using %ZSTART routine whenever any IRIS instance starts.