SFTP for EDI
SFTP remains the most widely supported way to exchange EDI files, especially with ERP systems that already write flat files.
Authentication
SSH key pairs rather than passwords, with per-partner accounts and restricted directories.
Folder conventions
Separate inbound, outbound, archive and error folders keep reprocessing predictable.
Monitoring
Missed or stale files trigger alerts, so a silent partner outage does not become a missed delivery.