-Guide utilisateur Office 365
https://support.office.com/en-us/office-training-center
Choose your mobile device:
https://support.office.com/en-us/article/set-up-office-apps-and-email-on-a-mobile-device-7dabb6cb-0046-40b6-81fe-767e0b1f014f?wt.mc_id=otc_workplace_productivity
Share a site with external users
Share your desktop or an app
https://support.office.com/en-us/article/video-share-your-desktop-or-an-app-2c09d629-b59f-4892-8bb9-f57414814ac3?ui=en-US&rs=en-US&ad=US