Implement Office.context.mailbox.item.getAsFileAsync for draft messages

We have a requirement in an Office.js add-in to do the following: Automatically send a message Save the sent message The functionality was previously implemented using EWS and Office.context.mai...

Office Add-ins deployment

Office Add-ins development

Office Add-ins UX

Berend Engelbrecht

Brass Contributor

Apr 11, 2025

I feel myself that API design could be more careful. It is peculiar and unexpected to a developer that function X operating on an email message can be used in the MessageReadCommandSurface but not in the MessageComposeCommandSurface. In Outlook you can save both a draft and a sent or received message in MIME format. I tried classic desktop and outlook.office.com web version.