An authentication error may occur when we change the status in the Item Fulfillment to Mark shipped which is the same in the Shipping Label Creation Stage in the Set Up Shipping page.
This error can be solved by deleting the existing FedEx Account and adding a fresh Developer User Account.
The instructions to create New Developer User Account can be obtained from Suite Answer Id: 20231
Note:
- If the same account is used in production as well as Sandbox, Removing the live account from sandbox won’t affect the production since each environment has its own live and test account.
- We cannot set two FedEx account in Sandbox, because the only account acceptable here is a “test account.”
- You will encounter the same error every time you will use one FedEx account for both sandbox and production.