Currently, the print utility on ArcGIS Online (Task: Export Web Map Task ), will not be able to complete print requests when the request comes from an application (Web AppBuilder or otherwise) that is utilizing a proxy to circumvent the need to prompt for credentials.
I have spoken with personnel from Esri about this and there advise was to modify the Esri Resource Proxy to attach the token onto the "WebMap_as_JSON" request that is sent to the print service.
Could this be added to the proxy in future releases? Could the print service be modified to be "proxy aware"?
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