There are three convenient ways to access email:
The Outlook Web App lets you use a web browser to access your mailbox from any computer that has an internet connection. You can use it to read/send email messages, organize contacts, create tasks, and manage your calendar and the shared calendars. You can use Outlook Web App with almost any Web browser. This includes Internet Explorer, Edge, Mozilla Firefox, Google Chrome, Apple Safari.
You can access Office 365 using your desktop Microsoft Outlook application (recommended by Microsoft).
Mobile phones and tablets
Office 365 also works with a variety of mobile phones and tablets. You can set up your mobile phone or device to access your email, calendar, contacts, and tasks check out Android, Apple iOS or BlackBerry support page for more information about how to configure your mobile device.