Two different cases must be considered when migrating user management from PPM 5 to PPM 9.9. For PPM 5 clients using the internal PPM user management, user management migration must be carried out for each client. For PPM 5 clients using the legacy user management, user management migration must be carried out for each client. In this step, all PPM users are migrated from PPM 5 to PPM 9.9.