374 votes14 comments · Feature Requests and Feedback » Microsoft Graph/O365 REST APIs · Flag idea as inappropriate… · Admin →
We have actually started this work. We will have an update in the next 3 months that will make it officially available on the beta endpoint. ^JTYves Dhondt commented
It should go both ways: we should be able to retrieve the entire mime stream as well as put it. This is especially important for sending and retrieving signed and encrypted messages.