In Portal for ArcGIS, limitations specified by the user roles are not applied to applications created in Web AppBuilder.
Last Published: July 29, 2016Portal for ArcGIS
Bug ID Number
January 27, 2016
March 30, 2022
Portal for ArcGIS
After review by the development team, it has been determined that this issue is related to a known limitation with the software that lies outside of Esri's control. The issue's Additional Information section may contain further explanation.
This is expected. Users in Portal can always edit features and they can do it in any application. The "Viewer" aspect of the role prevents the user from creating items, groups, and services. It does not prevent them from editing existing feature services that are in Portal or in feature services that are external to Portal.