Large Mailboxes
Each user gets 25 GB of mailbox storage standard and the ability to send attachments up to 25 megabytes (MB).

Outlook Support
Users can connect to their copies of Microsoft Outlook 2007 or later to Exchange Online, making it easy for them to use the rich client application they know and use every day.

Web-Based Access
For Web-client 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 capable of receiving e-mail, including Windows Phone, the iPhone, Android, Palm, Nokia, and Blackberry devices.

Shared Calendar and Contacts
Users can compare calendars to schedule meetings with Exchange Online and have access to collaboration features like shared calendars, groups, global address list, external contacts, tasks, conference rooms, and delegation.

Security
Every mailbox is protected with premier anti-spam and antivirus filtering via Forefront Online Protection for Exchange.

Archiving
Automatically archive old messages to a personal email archive to reduce inbox clutter, as well as reduce the liabilities associated with email by applying expiration policies.

Advanced Archiving and Compliance
Use legal hold capabilities to immediately preserve deleted and edited mailbox items from users’ primary mailboxes and personal archives.

Unlimited Storage
Take advantage of unlimited storage (25 GB of storage in the user's primary mailbox, plus unlimited storage in the user's personal archive).

Hosted Voicemail
Take advantage of hosted Unified Messaging services that provide call answering dial-in user interface and company automated attendant capabilities.

$4/user/month

$8/user/month