The setup of the email message API is done via the following documentation: Mail message API documentation

It is important to configure an email address via the Azure Portal with the right permissions Permissions email address documentation

The following API calls for mail/message exist. Not all of the calls are implemented yet to reduce application objects. Extra functionality can be added.

• List messages (implemented)
• Create draft message (implemented)
• Send draft message (implemented)
• Add attachment (implemented)
• Get message
• Update message
• Delete message
• Copy message
• Create draft to forward message
• Create draft to reply
• Create draft to reply-all
• Get message delta
• Forward message
• Move message
• Reply to a message
• Reply-all to a message
• Permanently delete
• List attachments

Please contact feel free to contact me for extra functions or if you have questions.