How do you get a Freelancer account ID when it says yours is not found

You will be assigned a new FLID once you attempt a multiplayer game with a server. If you used to have one and have reinstalled Freelancer, chances are you will have lost the game the server was saved on, but you may be able to recover it based on the server admin permissions. Remember to check your FLID and write it down should you ever decide to reinstall Freelancer.