I will want to connect the Survey 123 to Portal for ArcGIS.
I checked the Survey 123 interface. I found that It is possible. However I try
to put the URL of the Portal, but there is not conexion. "Survey log"
says the server hosting requires authentication. My portal has IWA
authentication. What is the process for doing ? Thanks
Survey 123 for ArcGIS is limited to using built-in users and does not currently support enterprise identity stores at this time.
FYI, this blog post might also be useful: Survey 123 and ArcGIS for Server
Hope this helps,