I'm having trouble publishing a survey from Survey123 Connect using an existing feature service. When trying to use a service account to create and publish the survey to the feature service, I keep getting "Error 401: Unauthorized". When I use my personal account to create and publish, it works fine. The service account can published a hosted survey fine.
The service account and I both have the same user type and role in our Portal (11.3). I've tried having my account own the feature service, as well as the service account own the feature service. The service account cannot publish even when it owns the feature service.
The feature service is published off of a feature class in a SQL Server EGDB. The feature class was created by my personal account in the database, but published as a feature service using the service account. The service account has edit permissions to the database feature class, and CAN edit and add new records to the published feature service inside a web map.
This is obviously a permissions problem but I can't figure out why or where. If the service account has database permissions to the feature class, owns the feature service and can make edits in a web map -- why can't it publish a survey?