All FirstDue mapping features are housed in esri ArcGIS Online.  Please first work with FIrstDue for them to show you how to extract the feature layers to esri AGOL.  Once extracted work with your GIS professional, or add the layers to the given map you want them on.  You could build a new map for FirstDue too; your choice.  The key is that this is all done on esri AGOL with the layers shared to the same group your maps currently reside.