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.
