To accomplish this in ServiceNow, you can create a Service Catalog item with an attachment variable for the Excel file, backed by a workflow or Flow Designer action. The underlying script should process the attachment using a GlideExcelParser (or Data Source and Transform Map), check for existing entries in the samp_sw_license_key table to filter out duplicates, insert the unique keys, and programmatically attach an error log file containing the skipped duplicate keys to an email notification sent directly to the user.
