Organization>settings>Utility Services>Elevation>Elevation (synchronous)>
https://elevation.arcgis.com/arcgis/rest/services/Tools/ElevationSync/GPServer
save.
The resulting config is stored in https://portal.domain.com/webadaptor/sharing/rest/portals/self
helperServices:
"elevationSync": {"url": "https://elevation.arcgis.com/arcgis/rest/services/Tools/ElevationSync/GPServer"},
Reference:
https://enterprise.arcgis.com/en/portal/10.7/administer/windows/configure-services.htm#ESRI_SECTION2...
