I know this is an old thread, but I came across it looking for this information and I have a solution.
Add the @arcgis/core library to your code. Import the FeatureLayer, Query, and Point objects. Then add the @terraformer/arcgis library to your code and import the arcgisToGeoJSON object.
This function will perform the query against the ArcGIS Feature Server and return the data as GeoJSON.
Rewriting the application in the JS API is exactly what you will have to do, in my opinion.I do not believe there is any support going forward for consuming AGS in Bing.
that API has been retired for several yearshttp://forums.arcgis.com/threads/108033-What-is-the-current-(10.2.1)-solution-to-mashup-a-web-service-with-Bing-Maps
Dear All, How can I add a web service hosted on an ArcGIS Server to a web application built with MS Bing Maps? Appreciate any replies. Thanks, Russel
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