is there any possibility to show geometry validation warning when validating on server?
Implement IGeometryValidationHandler in .NET custom extension. When there is an error in geometry - use standard way to show table with errors (GeometryContext.Faults.Add()). The similar way I would like to show warnings to user. Warning should not prevent user to save geometry, only warn that there might be a problem (when user click on OK, geometry should be saved).