Turn Off Outlook New Email Notifications & Sounds

By default, Microsoft Outlook shows a pop-up with an alert sound when a new email arrives in your Inbox.

To disable:

1. Open Microsoft Outlook.
2. Click File and then Options , then select Mail.
3. In the Message arrival section, go ahead and uncheck the following boxes: Display a Desktop Alert and Play a Sound.
4. Note that here you can also hide the envelope icon in your right hand side desktop bar.