Our future Magento (community1.5.1 ) shop is connected to our Dynamics Navision ERP system by an extension called Navconnect. After an order has been processed in Navision and the orders are synchronised back to Magento we d'like to show our Navision order references in the order history of the customer when the client is logged in into his account.
This Navision order number is our official order number for invoicing and need to be shown next to the default Magento order number. This Navision order number has to be shown in the order history grid, the recent order grid and also somewhere on the order detail page of the customer if possible. This navision order number is already generated in Navision by a the third party connector. So there is already a spot in de DB for this number and it is also visible in the backend somewhere. I guess it must be possible to show this number as well on the frontend of the Magento shop.