Salesforce displays event and task reminders differently in Classic and Lightning
Experience. You can customize reminders in your personal settings in both places.
Required Editions
Available in Lightning Experience, the mobile app, and Salesforce Classic in:
All Editions Except Database.com
Activity Reminders and Notifications in Salesforce Classic Salesforce displays event and task reminders in a reminder window. The reminder window opens whenever a reminder is triggered. When you log in, a sound plays if you have reminders that have been triggered since the last time you logged in. You can customize reminders in your personal settings.
