The 'Geocode Locations from Table' analysis tool returns the error message, "Mapping locator fields with input data fields failed, please use another locator” when using a private geocode service.
This is a documented limitation: http://enterprise.arcgis.com/en/portal/latest/administer/windows/configure-portal-to-geocode-addresses.htm#ESRI_SECTION1_2E39D7B0F3294C6595C9E8EAE2C810D3
対処法
Share the geocode service and add as an item in Portal for ArcGIS with Everyone.