I have used the blog notes on building a survey with an existing feature service, to create a survey looking at, and, writing directly back to our Enterprise Dev Database. Its worked extremely well and the field staff are really happy with the results
https://community.esri.com/groups/survey123/blog/2017/09/25/working-with-existing-feature-services-in-survey123-for-arcgis
Now that testing is underway, just wondering whats the best way to copy this dev survey and re-point it to the production service.
Cheers, Chris