I am currently working on a project in python to interface with the Office365 REST API, but I need to retrieve (all of) the Internet Message Headers for specific emails.
I've used the $metadata file to research the exposed properties and I don't see an obvious method to access this information.
I know that you can access the headers in OWA using "Message Details" so I would think that the information is web-accessible (even if it is not through the REST API).
Any help would be appreciated.