Exchange Online is an enterprise-class email solution incorporating mailbox management, strong security, anti-spam and anti-virus systems. Shared calendars, access from virtually any device and options for legal discovery and compliance make Exchange a complete solution for any business.

Manage business communications across devices, share easily and securely, with large mailboxes powered by the Microsoft Cloud.

Users can access their Exchange mailboxes with virtually any connected device, including Windows or Mac desktop computers, tablets and smartphones.

Email may be sent and received using the full desktop version of Microsoft Outlook (purchased separately, or as part of an Office 365 plan), the free browser-based Outlook Web Access product, or from tablet and smartphone apps.

Features 
Large mailboxes Each user has access to a 50gb mailbox
Large attachments Email messages can contain attachments of up to 150mb per message
Inbox management Machine learning can ensure the most important emails are brought to users attention
Shared calendars and contacts Access other users calendars, schedule meetings and share contact information
Shared mailboxes Use a virtually unlimited number of free shared mailboxes for generic accounts such as sales@, service@ and so on
Resource mailboxes Create free mailboxes for meeting rooms, equipment and other resources
Anti-spam Software to identify and manage spam is included with every mailbox
Anti-malware Software to identify and manage malware is included with every mailbox
Anti-virus Software to identify and manage emails containing viruses in attachments is included with every mailbox
Mail archiving Old messages can be automatically moved to an in-place archive to keep inboxes clean
Advanced features (Available only with upgraded Exchange Online Plans)
In-place hold Deleted mailbox items can be preserved to guard against user deletion of mail content
Unlimited storage Additional archives can be used to ensure mail is kept indefinitely
Data loss prevention Identify, monitor and protect sensitive data with policies to ensure information is not leaked outside the organisation