To add another email account in Outlook:
- Open your Outlook app.
- Click Fichier.
- Click Ajouter un compte.
- Enter the email address of the secondary account and click Connexion.
- Enter your password and click Connexion.
- Click Terminé and restart Outlook (close it and reopen it again).
- Give it a second.
- Once open, you will see your other account added.