Support internal locators as geocoders for batch geocoding (i.e. not external only as presently documented - https://doc.arcgis.com/en/arcgis-online/reference/geocode.htm#ESRI_SECTION1_CD53FF34D6A54AB8880A3AE9...) for ArcGIS Online subscription accounts that are signed in.
The idea is to enable customers to use secured, protected locators within the ArcGIS Online and ArcGIS Enterprise Portal component environments.