Large Mailboxes Each user gets 50GB of mailbox storage and can send messages up to 25MB in size.
Outlook Support Users can connect support versions of Outlook to Exchange Online so they can continue to use Outlook.
Web-based Access Outlook Web App provides a premium browser-based experience that matches the look and feel of the full Outlook client.
Mobility Mobile access is available from all phones that can receive email including Windows Phone, iPhone, Android, and Blackberry devices.
Shared calendar and contacts – Users can compare calendars to schedule meetings and can access collaboration features, including shared calendars, groups, the global address list, external contacts, conference rooms, and delegation capabilities.
Security – Every mailbox is protected with premier anti-malware and anti-spam protection via Exchange Online Protection.
In-Place Archive – Reduce mailbox clutter by automatically moving old messages to an In-Place Archive.
ZixGateway email encryption – includes integrated enterprise class policy based email encryption from ZixCorp.