Outlook is accessible from anywhere with a web browser, but there is also an Outlook app for most mobile devices.
Resources
Quicksheet Downloads:
Outlook 2016 – Quick Start Guide (Windows)
Outlook 2016 – Quick Start Guide (Mac)
Outlook Online Mail
Outlook Online Calendar
Outlook 2016 Mail (Windows)
Outlook 2016 Calendar (Windows)
Outlook 2016 Mail (Mac)
Outlook 2016 Calendar (Mac)
Outlook Mobile (iOS)
Outlook Mobile (Android)
App Downloads:
Outlook for iOS
Outlook for Android
Videos:
Getting started with Outlook (Windows)
Getting started with Outlook (Mac)
How-Tos, Tips & Tricks:
4 steps to an organized Inbox (Windows, Online) – PDF
More on Using Outlook (Online)
50 time-saving Outlook keyboard shortcuts (Windows) – PDF
More Outlook keyboard shortcuts (Windows)
Keyboard shortcuts for Outlook (Mac)
5 ways to make Outlook work for you (Windows, Online) – PDF
More Outlook tips & tricks