portalUrl

The URL of the portal from which this local item was downloaded. This property can be used in conjunction with the LocalItem.originalPortalItemId to find the URL of the portal from which this local item was downloaded. This can be useful when following offline map workflows as it allows you to find the URL of the online webmap.

This property will be empty when the local item was not created from an online resource - for example if exported from ArcGIS Pro.