Simply describe Exchange Online?

Microsoft Exchange Online is a hosted enterprise messaging solution providing the power of Exchange email, calendar, and contacts with built-in functionality to help protect against viruses and spam at no extra cost giving customers anywhere access to mailbox data across PCs, the Web and mobile devices.

Benefit #1: Reliability, Availability and Performance

Delivers reliability, availability and performance with a guaranteed 99.9% uptime and money-back SLA with 24/7, IT-level phone support

Benefit #2: Minimal Training

Integrates with the same Microsoft Outlook and Office programs your users know, ensuring a minimal learning curve

Benefit #3: Large mailboxes

Each user gets 25 GB of mailbox storage standard and the ability to send attachments up to 30 MB.

Benefit #4: Antivirus/anti-spam

Forefront Online Protection for Exchange is included, providing multiple filters and virus-scanning engines to help protect your organization from spam, viruses, and phishing scams.

Benefit #5: 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.

Benefit #6: Mobility

Mobile access is available from all phones capable of receiving email, including Windows Phone, the iPhone, Android, Palm, Nokia and Blackberry devices.

Benefit #7: 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.

Benefit #8: Business continuity

Your data is continuously replicated to datacenters in different geographic locations providing advanced security and reliability features. Microsoft data centers meet a wide variety of industry standards and certifications, including ISO 27001.

Benefit #9: Administration center

A centralized, Web-based administration console allows you to configure Exchange Online to manage subscriptions, provision users, reset passwords and configure services from anywhere you have Internet access.

Benefit #10: Migration tools

Free migration tools are available to transfer historical mailbox data to your Exchange Online environment. IMAP-based tools allow basic migration of historical email from non-Exchange environments. For Exchange 2000, Exchange 2003, and Exchange 2007, robust tools migrate all mailbox content, including email, calendar items, contacts, and tasks.

Benefit #11: Additional deskless worker options

A version of Exchange Online designed for employees who require fewer messaging features because they are infrequent users. This option provides a 500 MB mailbox with access to email, calendar, contacts, and the company directory via the light version of Outlook Web App.

Benefit #12: Email coexistence

Maintain on-premises Exchange Server mailboxes and Exchange Online mailboxes in an integrated email environment. This enables you to segment your users according to their messaging needs, and migrate to the cloud at the pace that is right for your organization.