I haven't come across being able to get Outlook to remind you if it is not open. But if you start Outlook and minimize it to the taskbar any tasks, appointments that have a reminder set will be advised to you at the time you have specified.
Samsung Galaxy S8 review
1995-2015: How technology has changed the world in 20 years
This 2D animation about monsters is illustrated in a Van Gogh painterly style
How to get WWDC 2017 tickets
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.