To change your profile picture in Outlook, if you are in outlook please go to File - Account Information - Change
This will take you to webmail https://outlook.office365.com then follow the steps below.
- Click on your name in the top right of the screen this will expand the screen to say "My account"
- Then click on your picture which will open a screen that says "Change Photo"
- Click on the "Browse..." button and find the photo you wish to upload select the photo and click "Open".
- Once your photo has uploaded click "Save".
When you now send e-mails in Outlook the recipient will see your profile picture.