Office 365 Outlook Web App - Create New Message
1. In Outlook, click +New in the upper left. A new message form will appear in the reading pane.
This document provides an overview of how to create a new message in the Office 365 Outlook web app.
2. Enter the e-mail address and type the message. To add an attachment, click Insert (paperclip icon). Total message size is limited to 25 MB including attachments.
3. When finished, click Send.