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Microsoft 365

What is the difference between Office 365 and Microsoft 365?

By Suresh Girinathuni

Quick answer

Office 365 refers to Microsoft’s cloud productivity services — mail, collaboration, meetings, and Office apps delivered as subscriptions, a name still carried on many plans. Microsoft 365 is the wider offering that combines those productivity services with Windows, Microsoft Entra ID identity, Intune management, and security capabilities, varying by plan. In practice: Office 365 answers “which productivity apps do we get,” Microsoft 365 answers “which complete workplace platform do we run.”

Key takeaways

  • Office 365 = productivity services line; Microsoft 365 = platform bundle.
  • Compare plan SKUs, not brand names, before licensing.
  • Security and management layers are the usual upgrade reason.

Detailed Explanation

Office 365 refers to Microsoft’s cloud productivity services — mail, collaboration, meetings, and Office apps delivered as subscriptions, a name still carried on many plans. Microsoft 365 is the wider offering that combines those productivity services with Windows, Microsoft Entra ID identity, Intune management, and security capabilities, varying by plan. In practice: Office 365 answers “which productivity apps do we get,” Microsoft 365 answers “which complete workplace platform do we run.”

How it works

Compare plan contents rather than names: an Office 365 plan centers on Exchange/SharePoint/Teams/OneDrive plus apps, while Microsoft 365 Business Premium or E3/E5 layers identity, device management, and advanced security on top.

Limitations and considerations

Naming is inconsistent across resellers and legacy invoices — always verify the exact plan SKU and included services before licensing decisions.

This Q&A page is the short-answer layer for “What is the difference between Office 365 and Microsoft 365?” Use the related guides below when you need implementation steps, architecture trade-offs, or troubleshooting detail.

For broader context, visit the Microsoft 365 Hub. It connects this topic to surrounding Microsoft 365, Power Platform, SharePoint, Copilot Studio, Dataverse, migration, and Dynamics 365 guidance.

When to use it

Use this distinction when buying or renewing plans, explaining invoices to finance, or deciding whether you need the security and management layers of Microsoft 365.

Practical example

A 50-person firm outgrows Office 365 Business Standard and moves to Microsoft 365 Business Premium specifically for Entra ID Conditional Access and Intune — not for more Office apps.

Related Questions

What is Microsoft 365?Microsoft 365 is Microsoft’s cloud productivity platform — Teams, SharePoint, OneDrive, Exchange Online, and Microsoft 365 Apps — combined with identity (Entra ID), security, compliance, and administration.What is Microsoft Entra ID?Microsoft Entra ID — the renamed Azure Active Directory — is Microsoft’s cloud identity service: it signs users into Microsoft 365 and connected apps and enforces access with Conditional Access, MFA, and role controls.What is Microsoft Graph?Microsoft Graph is the unified API for Microsoft 365: one endpoint model to read and manage users, groups, Teams, SharePoint, mail, calendars, and more — governed by explicit permissions and consent.What is Microsoft Teams?Microsoft Teams is Microsoft 365’s collaboration hub — chat, meetings, calling, and teamwork — built on SharePoint (files), Exchange (calendars), and Entra ID (identity) underneath.

Related nextM365 Guides

Microsoft 365What Is Microsoft 365? A Complete Beginner’s Guide to Apps & How It WorksNew to Microsoft 365? Start here. This beginner-friendly guide explains what Microsoft 365 actually is, the difference between Office and Microsoft 365, the apps you get, how the cloud keeps everything in sync, and how Copilot AI fits in — all in plain English.Microsoft 365How to Create a Microsoft 365 Business AccountA beginner-friendly guide to creating a Microsoft 365 business account, setting up the tenant, adding a custom domain, creating users, assigning licenses, and securing administrator access.

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