Outlook add-in : Inconsistent @odata.type for .msg files
问题 Since shared mailbox is not supported via EWS, which we used for downloading .msg (ItemAttachments) and all other attachments were downloaded over REST We updated the outlook add-in to filter any 'ItemAttachments' and display them as un-supported for shared mailbox, which works fine. But while testing, I found that some .msg files were being downloaded via REST which was surprising and a concern. Finally got to re-create and found that: When a mail is dragged and dropped within outlook into a