Dave, Using RACF you can have hundreds of logonby users, or you can group users and authorize those groups to do logonby to a server. We normally have a racf group for the system programmers, and grant that racf group access to the logonby profiles for the server userids. A similar setup is used for instance for the operators, they are authorized for OPERATOR and a few other operator userids.
By doing this, it is very easy to maintain the list of operators, VM system programmers, Linux system programmers and so on. When somebody joins or leaves such a group, all you need is to connect/remove the personal userid to/from the maintenance user groups. Ronald van der Laan
