Import existing emails into Office 365 While Preserving Original Date

Question

Do either Microsoft Graph or Outlook REST API support importing existing emails into an Office 365 mailbox?

By definition, importing means copying emails in a way that preserves their original information, including their created / sent / received date.

I have tried these endpoints to no avail:

• POST http://graph.microsoft.io/en-us/docs/api/reference/beta/api/user_post_messages
• POST https://outlook.office.com/api/v2.0/me/sendmail

Thus either I have used them wrongly, or it is simply that they do not support setting date-related fields.

Answer 1

No, the APIs do not have any ability for importing. It's a great idea though! You should make an entry on our UserVoice forum.