I 'm going to import customer data from an legacy system into navison. Is it possible after importing the data to recreate customer codes according to Navision No. Series?
You could create Navision customer no. on importing, using the Navision no. series functionality (maybe of the OnInsert trigger of the customer table). But make sure that you save the legacy no. of the customer somewhere in a new field in the customer record, to be able to link data together from additional data you might import or for later reference.