I'd like to create an add-in which create a .msg file of an email and sends it to a remote server for archival purposes. Outlook already can create .msg files through the "Save as..." dialog but thi...
It looks like Microsoft has added an Outlook Javascript API preview method for generating a .eml file here:
https://learn.microsoft.com/en-us/javascript/api/outlook/office.messageread?view=outlook-js-preview&preserve-view=true#outlook-office-messageread-getasfileasync-member(1)