Turn on Outlook and Zoom Notifications for Mac If your notifications stopped working for Outlook or Zoom,re-enabled them within the system settings on the Mac. 1. Click the Apple at the top left of your screen, then click "System Settings" 2. On the left column, choose "Notifications". 3. On the right, scroll down and choose Outlook or Zoom. 4. Ensure that the top slider is enabled, and that all desired notifications are enabled below.