Description: Default OMVS segment support is no longer provided regardless of whether the BPX.DEFAULT.USER profile is defined in the FACILITY class. z/OS® UNIX users or groups must have OMVS segments that are defined for user and group profiles with unique UIDs and GIDs. Alternatively, you can use RACF® support for automatically generating unique UIDs and GIDs on demand for users and groups that do not have OMVS segments that are defined.
When change was introduced: z/OS V2R1