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Office 365 (Outlook 2016 | Outlook 2013) - Turn new message alert pop-up on or off
A Desktop Alert is a notification that appears on your desktop when you receive a new email message, a meeting request, or a task request. By default, Desktop Alerts are turned on.
The information displayed in a Desktop Alert varies depending on the item that you receive in your Inbox.
- Email message
Displays the name of the sender, the subject, and the first two lines of the message. A Desktop Alert doesn't display the contents of an encrypted or digitally signed message. To view the message, you must open it.
- Meeting request
Displays the sender, subject, date, time, and location of the meeting.
- Task request
Displays the sender, subject, and start date of the assigned task.
- On the File tab, choose Options > Mail.
- Under Message arrival, select or clear the Display a Desktop Alert check box.
Note: To suppress other notifications such as playing sounds, changing the mouse pointer, or displaying an envelope icon in the taskbar, clear the respective check boxes for those functions.
- To change the transparency of Desktop Alerts or how long they're visible, choose Desktop Alert Settings.