Change the From Address in Office 365 MavMAIL

Question

In a new email how can I change the from address in MavMAIL?

Overview

1. Click on New Message on the navigation bar
2. Click on ... on the navigation bar
3. Select Show From
   
   
4. Type in the email address you wish to send from
5. In the from field, enter the email address you want to send from
   
   Note:  You need to have Send As access to be able to send from an email account.  If you need access, please contact the person you wish to send as.
   
   
   
6. Enter the rest of the information as usual and click Send