Update your Mail and Calendar apps to use this type of account - Microsoft Support

What to Do When There's an “Unusual Sign In Activity” to Your Microsoft Account

Use the Outlook browser extension in Microsoft Edge and Google Chrome - Microsoft Support

Outlook on the web - Email & Calendar

Microsoft rolls out a new update for Mail and Calendar app, now lets you write email using Pen - MSPoweruser

Change what appears on the Navigation Bar - Microsoft Support

Microsoft continues to improve its Windows 10 Mail & Calendar app

Microsoft Mail and Calendar

How to Uninstall Mail and Calendar Apps in Windows 10 - MajorGeeks

Manage your calendar in the light version of Outlook - Microsoft Support

Calendar (Windows) - Wikipedia

Mail and Calendar - Microsoft Apps