Each user gets 100 GB of mailbox storage and can send messages up to 150 MB in size.
Connect to Outlook
Users can connect supported versions of Outlook to Exchange Online, so they can use the rich client application they already know.
Outlook Web App
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.
Calendar & contacts
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
Keep your inbox clean by automatically moving old messages to an In-Place Archive.
Safeguard your data by hosting it in globally distributed data centers, with continuous data backup and premier disaster recovery capabilities.
Exchange ActiveSync enables mobile phone users to access their email, calendar, contacts, and tasks, and to continue to access this information while they're working offline.
If a mobile device is lost, stolen, or otherwise compromised, you can issue a remote wipe command from the Exchange Server computer or from any Web browser by using Outlook Web App. This command erases all data from the mobile device.
Every mailbox is protected with Exchange Online Protection, a cloud-based email filtering service that helps protect your organization against spam and malware, and includes features to safeguard your organization from messaging-policy violations.