The AGOL Update Data feature is really useful, especially for non-GIS users who want to update attributes in bulk. However this bulk update has one downfall and that is users don't know which records are rejected or fail to upload correctly. You might have 200 records in your CSV file but the success message says 196 records were updated successfully. Which 4 failed?
Would it be possible to add the option of a reject file (or similar) which would contain the details of the rejected records? Ideally it would contain the reason for the rejection as well, either tabular or spatial.
