If EDI transfer orders are validated and approved in the EDI transfer order staging journal, these can be imported into the Transfer orders with a custom 'EDI transfer order to Transfer order' message. Usually, you run this message in batch. The message should automatically get the Approved EDI transfer order journals and update the related transfer orders with the imported information.
Set up a custom 'EDI transfer order to Transfer order' message with a:
Source connector of type Staging journal.
Source document of type Staging.
Target connector of type D365 F&SCM.
Target document of type D365 F&SCM. It should update the data of the Transfer order in D365 F&SCM.