Hi, After upgrading my system to win10 pro. from win 8.1 non of my alarms, calendar events reminders even when setting a new reminder in Cortana. remind me at the specific time. Just silence no alarm sound or popup notification. i have a message with red in settings say (some settings are managed by your organization) and cant set app notifications to on in its setting panel (it set to off and grayed). Which I think it's the reason.