Can't get most email headers in Outlook Addin API
I'm trying to get all email headers from a selected Outlook email while inside an Outlook Addin. I've found the Preview API that should allow me to get the headers. This is what I have tried as of now Office.initialize = (reason) => { headerNames = ["Received-SPF"] Office.context.mailbox.item.internetHeaders.getAsync(headerNames, print); } print(asyncResult) { console.log(asyncResult.value); } The problem is when I start to put more headers, the API doesn't return them. The only ones I get are Received-SPF, DKIM-Signature and Authentication-Results. All other headers (Received, To, X-Microsoft