Office 365 Small BusinessOffice Web Apps: Create and edit Office files via a web browser. Exchange Online: Cloud-based email 50GB of storage space per user

Microsoft (Office 365_Small Business) – Office 365 Small Business
Office Web Apps: Create and edit Office files via a web browser.
Exchange Online: Cloud-based email 50GB of storage space per user, Contact and calendar sharing, Premium antivirus and anti-spam filtering, Configurable anti-spam filtering
Lync Online: Conduct meetings over the web with HD video conferencing, screen sharing, and instant messaging.
Sharepoint Online: Enable easy access and sharing of documents with 10 GB baseline storage plus 500 MB of storage per user.