If you need to access your emails from home please go to outlook.office365.com
To login type your full email address and password.
This is also the password you use to log into your computer at work.
If this is your first time logging in, you will get this pop-up and you can click Yes and don't show this again.
Once you get logged in you will see this welcome screen and it will show you helpful features.
On the bottom left of your main mailbox screen you can switch between mail and calendar.