We have Portal 10.9.1. In the map viewer, as well as map viewer classic, you can search for layers in ArcGIS Online. When I find something, I can view details about the layer and it appears like I can favorite the item. However, I cannot favorite an item that exist outside of our Portal. I can see the icon to favorite something, but it doesnt work. I am not really looking for an alternative, just looking for confirmation that it is something that does or doesnt work for Enterprise 10.9.1. I can successfully favorite something that resides in the "Living Atlas", but not AGOL.
Thanks for looking