I have an SDE Feature Class and a related SDE Table that were published to an ArcGIS Server Map Service with Feature Access enabled.
The ArcGIS Server Map Service is on our internal server and only accessible to members of our Domain.
I can edit the Feature Class and Table in a locally hosted Web AppBuilder application, but I can't change any of the popups in the webmap including none editable layers which I have added.
I tried to copy the webmap to see if there is an issue with the webmap but that didn't change the behavior.
I have also tried to add the Feature Class and SDE Table to a new Map and I still can't configure the popups. The popups work, but no configuration is possible.