- Large mailboxes
Each user gets 50 GB of mailbox storage and can send messages up to 150 MB in size.
- Outlook support
Users can connect supported versions of Outlook to Exchange Online, so they can use the rich client application they already know.
- 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.
- Outlook app
Get more done on your phone and tablet with the Outlook app for iOS and Android—and soon in Windows 10.
- Inbox management
Stay focused on the most important messages with Clutter, which applies machine learning to clean up your inbox and set up rules that match the way you work.
- Document collaboration
Save attachments directly to OneDrive for Business with just one click and share the link to the file—right from Outlook Web App.
Simplify collaboration with Office 365 Groups, which lets teams self-organize, work together across tools and devices, and build upon the expertise of others.
- Shared calendar and 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.
- Third-party apps for Outlook
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.
Every mailbox is protected with premier anti-malware and anti-spam protection via Exchange Online Protection.
- In-Place Archive
Keep your inbox clean by automatically moving old messages to an In-Place Archive.