Photograph of a person seated at a table in a conference room working on a tablet with a stylus. There is another person seated at the table and another person standing in the background. They both have laptops.

Office 365 E3

• Includes full desktop versions of Office apps
• Each user can install Office mobile apps on 5 PCs or Macs, 5 tablets, and 5 phones
• Five layers of security and monitoring help keep customer data safe
• Reduce IT costs, and move to the cloud on your terms
• Guaranteed 99.9% uptime, and 24/7 support from Microsoft
$20.00 user/month
(annual commitment)
Overview Requirements FAQs

Move your business ahead

Get the latest Office desktop and mobile apps, plus integrated collaboration services, coupled with advanced compliance features and full IT power. 

Office 365 E3 includes

Take your business further with Microsoft 365 Enterprise

Microsoft 365 brings together Office 365, Windows 10, and Enterprise Mobility + Security. It combines best-in-class productivity apps with intelligent cloud services to transform the way you work.

Learn more about Microsoft 365 Enterprise

Features included

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    View and edit Office documents with Office mobile apps using just a browser on Windows, iOS, and Android devices. Learn more

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    Document and email access control

    Rights Management Services restrict access to documents and email to specific people, preventing anyone else from viewing or editing them.

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    Office for the web

    Create and edit Word, OneNote, PowerPoint, and Excel documents from a browser. Learn more

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    Email and calendars

    User business-class email through a rich and familiar Outlook experience you can access from your desktop or from a web browser. Get a 100GB mailbox per user and send attachments up to 150MB.

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    Hub for teamwork

    Connect your teams with Microsoft Teams in Office 365, where chat, content, people, and tools live together. Use Teams to plan schedules, assign tasks, and connect to other apps and resources. Learn more

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    Workflow automation

    Build automated workflows between apps and services to get notifications, synchronize files, collect data, and more with Microsoft Flow, no coding required. Learn more

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    Online meetings

    Host online meetings with audio, HD video, and web conferencing. Broadcast meetings online for up to 10,000 people who can join with just a browser on almost any device. Learn more

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    Professional digital storytelling

    With Sway you can easily create engaging, interactive web-based reports, presentation, newsletters, trainings, and more, right from your phone, tablet, or browser. Learn more

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    File storage and sharing

    Get unlimited1 OneDrive storage accessible from anywhere, on any device. Easily share documents with others inside and outside your organization and control who can see and edit each file. Learn more

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    Enterprise video service

    Use Microsoft Stream to easily create, manage, and share videos securely across your organization. Learn more

Add-on Services

Calling plan

Subscribe to Calling Plans from Office 365 and use existing phone numbers or get new ones.

Audio Conferencing

Attendees can dial into a meeting, with a local access number, in addition to single touch join options on PC or mobile.

Modern voice with Phone System

Make, receive, and transfer business calls anywhere, using any device.

Multi-Geo Capabilities in Office 365

Manage your global data residency needs with per-user data location controls.


Get started

Get started with Office 365 setup

Get training

Learn how to use the service (for end users)

Support resources

Fast help from experts, delivered when and how you need it

System requirements

Learn more about the premium versions of the Office apps across all your devices, monthly exclusive features updates, and more.

Detailed service descriptions

Get a detailed look at the Office 365 services and features

Office 365 for business roadmap

Get the latest updates on Office 365 and more

1 Unlimited OneDrive storage for subscriptions of five or more users. Microsoft will provide initial 5 TB of OneDrive storage per user. Customers who want additional OneDrive storage can request it as needed by contacting Microsoft support. Subscriptions for less than five users receive 1 TB OneDrive storage per user.