IEFUTL running on z/OS 2.3 gets front ended by routine CAIMB8G8

Document ID : KB000108011
Last Modified Date : 26/07/2018
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Introduction:
Our IEFUTL SMF exit doesn't appear to be getting control when running under z/OS 2.3 lpar. 
Question:
Our IEFUTL SMF exit doesn't appear to be getting control when running under z/OS 2.3 lpar. We've opened a ticket with IBM SMF and they provided a SLIP trap to create an SVC dump when IEFUTL is supposed to be getting called. After reviewing the dump, IBM has indicated that routine CAIMB8G8 is being called instead of IEFUTL. I have the z/OS 2.3 support maintenance on Common Services: 
Environment:
z/OS
Answer:
Our IEFUTL was not being executed because we did not have IEFUTL defined in SYSJES2 of the SMFPRMxx member. This is required for us
under z/OS 2.3