I find a bug, which makes makes using url scheme impossible in ArcGIS Online and Collector. When I try add link with some url scheme like fmp:// to popup, it works only until I save and refresh the map. After saving and refreshing (or opening in Collector) it stops working because ArcGIS Online automatically change url scheme to "#".
It makes communication Collector or ArcGIS Online with different apps impossible, because there is no possibility to define valid link.
Please see the screencast: Dropbox - ArcGIS Online custom url bug.mov
1. Is there other way to define custom link in popup?
2. Esri please fix it.
Has there been any solutions to this? I'm also experiencing the same behavior. I have also tested this in Portal 10.6 and it's doing the same thing.
Is there a workaround for this?