Problem:
When using Oracle OIC Notification action, the email is sent with a default no-reply@oracle.com.
See example https://cloudcustomerconnect.oracle.com/posts/f62529cc87
This is not a good practice for Customer facing notification.
Solution:
To use customized From email, you'll need to be on Version: 18.4.1.0.0 (181017.0400.17560) or greater.
Then set your Integration - Settings - Notifications - Approved Sender
Voila!