EDG_EXIT300 exit routines run in SUPERVISOR STATE KEY 5 AMODE(31) RMODE(ANY) in the user's address space. Exit modules can be contained in any APF authorized LNKLST library or an APF authorized library named on CSVDYNEX macro invocation.

You can write your installation exit so that it can issue commands or call other programs to update external inventories. You can also code the exit module to issue a WTOR if needed.