I am using Graph API with my Outlook Web Add in and have noticed that the headers i see when clicking the email > File > Properties , do not match up with the headers that are returned from the Graph API.
From, To, In-Reply-To and MessageID are ones I've noticed so far that are missing.
Are there certain permissions that i need to set up on the app side , or something i am missing in my request, or something different here that is causing these headers to be ignored ? Here is my request for reference:
"https://graph.microsoft.com/v1.0/me/messages/" + restID + '/ $select=internetMessageHeaders'
Any insight to this is much appreciated, thank you!