The Office 365 Exchange-grade email is a commercial tier email solution designed for streamlined performance, security and reliability.
- Security | Every mailbox is protected with premier anti-malware and anti-spam protection via Exchange Online Protection.
- Mailbox Size | Each user gets a choice of 50 GB of mailbox storage or unlimited mailbox storage and can send messages up to 150 MB in size.
- Web Client Access | For web-client access, Outlook on the web provides a premium browser-based experience that matches the look and feel of the full Outlook client.
- Integrated Calandar | Each user has a calandar integrated. You can also compare calendars to schedule meetings and access collaboration features, including shared calendars, groups, the global address list, external contacts, tasks, conference rooms, and delegation capabilities .