FedEx API expiring - Updates are available in the Download center
If you are using the FedEx shipping rate lookup service in your store, the current FedEx API service will be expiring at the end of the month.
There is an update to Power Store available in the download center that can be used to correct the issue, there will also be a copy of the updated fedEx support files that can be used if you wish to apply the fix manually.
you will need to Migrate you FedEx account to the New API to get a new FedEx account number, meter number, signature and password. you can do the migration at the FedEx site: