This exit allows you to modify information passed to the security authorization facility (SAF) of MVS™. $SEAS invokes this exit just before passing control to SAF. You can:

• Bypass the default SAF call and perform your own security checking.
• Do additional security checking besides what SAF provides.
• Pass your own return and reason code to the invoker in place of the standard SAF return code.
• Pass information from JES2 to the security subsystem.
• Disable specific SAF security checking.