Once you have reviewed and modified all of the JCL you can move on to configuring z/Server itself. The configuration for z/Server is stored in XML format and is in hlq.ZSERVER.CONFIG(IVPXML).
<Configuration SVC_NO="NNN" DSP_TOKEN="TAURSERV" IPSTACK="TCPIP" >
<STCScheduler
SCHEDULER_NAME="TAURISPF" LISTENER_PORT="1200" FIRST_PORT="1201"
LAST_PORT="1249" USER_SERVER_JOBNAME="IVPUSRT" CCSID="037"
>
<UserServer CCSID="037" />
</STCScheduler>
</Configuration>
The aspects of z/Server's behavior that you want to modify determine the parts of the XML that you need to edit.