This policy setting specifies the number of minutes after midnight (local time) that Quiet Hours is to end each day. If you enable this policy setting, the specified time will be used, and users will not be able to customize any Quiet Hours settings. If you disable this policy setting, a default value will be used, and users will not be able to change it or any other Quiet Hours setting. If you do not configure this policy setting, a default value will be used, which administrators and users will be able to modify. Counter Measure: Configure this setting depending on your organization's requirements. Potential Impact: The specified Quiet Hour end time will be used. Fix: (1) GPO: User Configuration\Administrative Templates\Start Menu and Taskbar\Notifications\Set the time Quiet Hours ends each day (2) REG: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\CurrentVersion\QuietHours!ExitTime (3) WMI: ###