We're in a legacy environment for a variety of reasons. Geoprocessing services published in ArcGIS Desktop 10.8.1 work just fine with Web App Builder for Enterprise 10.9.1 - meaning the resulting URL to the output file can be clicked and opened. This is NOT the case with an ArcGIS Pro 2.9.14 backend, the output URL from the geoprocessing service does not "match" what Web App Builder is expecting. Has anyone experienced this, probably in the past, and come up with a solution. I have a lot of geoprocessing service experience and ESRI technical support hasn't been much help.