Follow along with the video below to see how to install our site as a web app on your home screen.
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got that info from here:Although you can't change the default snooze period—it's always 5 minutes to start-–Outlook will remember if you prefer a different amount of waiting time before the next reminder. For example, if you snooze a reminder for 2 hours, when that reminder appears 2 hours later and you're in the same Outlook session, Outlook will offer to snooze it for another 2 hours.