The functionality to download a CSV of order data is only applicable when there are 100 lines or less of orders for inline exports. This is due to the potential file size of the resulting download, so rather than compressing and downloading a file directly on the interface this file is compressed and emailed to the seller instead.
Once the output of lines exceeds 100, the option will change from an in-line download order history to a request for an email address (examples below) to send a filtered report to.
This can vary depending on your filter settings. For example, searching for invoices created between January 1st and 2nd may result in less than 100 lines, therefore the download button still appears.
There is no mass 'enable/disable' function for this feature. If the seller wishes to continue downloading order history directly from the seller portal, it is recommended to filter using particular invoice dates to continue to download their order history.