Taken from the WooCommerce documentation: http://wcdocs.woothemes.com/user-guide/extensions/ordercustomer-csv-exporter/#section-4 This post is in relation to the ‘Order/Customer CSV Exporter‘ plugin. Adding custom meta fields to exports Starting from version 1.6 there has been possibility to add custom meta fields to the orders export csv output. Adding custom meta fields to the export can be done using ’woocommerce_export_csv_extra_columns’ filter. Below  Full Article…