Large mailboxes
Each user gets 50 GB of mailbox storage and can send messages up to 25 MB in size.
In-Place Archive
Reduce inbox clutter by automatically moving old messages to an In-Place Archive.
In-Place Hold
Use In-Place Hold to preserve deleted and edited mailbox items from users' primary mailboxes and In-Place Archives.
Outlook support
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Users can connect supported versions of Outlook to Exchange Online, so they can use the rich client application they already know.
Web-based access
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For web-client access, Outlook Web App provides a premium browser-based experience that matches the look and feel of the full Outlook client.
Apps for Outlook
Users can spend less time switching between apps with an extension model that allows third-party web applications easy plug-in access for both Outlook and Outlook Web App.
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, tasks, conference rooms, and delegation capabilities.
