This option includes all the features of Business Essentials and Business within one integrated plan:
Price: From $17.50 user/month- 1 Year Subscription per User
This is comprised of the online version of Office with email and video conferencing capabilities and includes:
From $11.20 user/month- 1 Year Subscription per User
From $29.60 user/month- 1 Year Subscription per User
To get the most out of Office 365, it’s important that you choose the right application to access and manage your calendar and email.
One option is Outlook Web App which is the interface you can use to access Office 365 via a web browser. Another is a desktop client such as Outlook.