Have you tried connecting your FedEx Account following this guide here? 

 
If you're trying to connect your FedEx USA Account, you also need to request the API credentials and Meter Account Number to your FedEx Account Manager. 

As soon as you retrieve these credentials, please send them to us in chat 💬 or by email at [email protected] and we're going to add them to your connection.🎈

Done! 🎉

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