Do one of the following:
Move the Desktop Alert to a different location
A sample Desktop Alert is displayed on your desktop.
You can move the Desktop Alert to a different monitor if your desktop spans more than one monitor.
Change the appearance of Desktop Alerts
Note These settings also apply to the Desktop Alert that can be specified as a rule action.
You can also turn off Desktop Alerts by right-clicking the Microsoft Outlook icon in the notification area and clicking Show New Mail Desktop Alert.