TB.One uses the “Fakturierende” flag for OTTO to indicate that an article is no longer active. As long as your articles are active, TB.One exports the date 19.01.2038 to OTTO as the “Fakturierende” (invoicing end date). If you deactivate an article, TB.One exports the current date to OTTO as the “Fakturierende”. This means that if you deactivate the article today, TB.One exports today's date to OTTO as the “Fakturierende”.