...
In OP admin > Search Accounts > Feeback Files
Click the Add/pencil icon
Add all the carriers the retailer will be using
File format: Omni_Tracking_with_reference_returns
Enable: Yes
Output: Email_And_Ftp_push_out
Email address: ftptrackingfile@gmail.com
Ftp server: ftp.omniparcel.com
ftp port: leave blank
folder: ftp: /OmniRPS/FtpTrackingFiles/Inbound
Username: Kinjal
Click Save
...