How should we proceed if the original transfer email was to sent the Corresponding Author?

The Submitting Author will need to complete the transfer. They can either request that the Corresponding Author forwards you the email containing the transfer link, or they can login to their Author Center in the transferring journal and click the link for ‘Manuscripts Awaiting Approval to Transfer’. From there they will see an Action column with links for either ‘Approve’ or ‘Reject’.