It is located under "C:\ProgramData\Symantec\SMP\Settings"
See also:
KB 180287 "Where are the Symantec Installation Manager and Symantec Management Platform log files stored"
KB 180373 "Where are the event queues (EvtQueue, EvtQFast, etc) for Symantec Management Platform located?"
KB 180374 "Where is the Replication folder for Symantec Management Platform 7.1 located?"