I have a situation where we are using Magento to manage Web based orders.
However .. all invoicing is occuring through our SAP system. I therefore need to firstly create an invoice in SAP, and then manually use that number as my invoice number in Magento.
I do understand that this is by no means an efficient way of doing things, but our business IT restrictions mean that we cannot link the systems.
Is there a way of using Manual invoice numbers within Magento ?
Thank you in advance for any advice.