The APEX_INSTANCE_ADMIN package provides utilities for managing an Oracle Application Express runtime environment. You use the APEX_INSTANCE_ADMIN package to get and set email settings, Oracle Wallet settings, report printing settings and to manage schema to workspace mappings. APEX_INSTANCE_ADMIN can be executed by the SYS, SYSTEM, and APEX_190100 database users and any database user granted the role APEX_ADMINISTRATOR_ROLE.