Automatic Feed Upload

Greetings All,

I need some guidance / help in uploading a external feed to  an an application where data is analyzed and process. Manual data upload using credential is working using an individual O365 User ID but this uploading requires credentials and be logged in constantly. I am trying to automate this so that the upload automatically and is done without using the individual credentials. I can a service account if need be.

Can I get some help please?