If your business runs on Word, Excel, Outlook and Teams, you are already living in Microsoft 365. It is the productivity suite that businesses of every size around the world rely on to communicate, collaborate, create documents and keep their data secure.
You may still know it as Office 365. Microsoft renamed Office 365 to Microsoft 365 on 21 April 2020, to reflect that it is now far more than the classic Office apps. It bundles the apps you know with cloud services, business-grade security and, more recently, built-in AI.
So what exactly is Microsoft 365, how is it different from the old one-off version of Office, what does each business plan include, and where does AI fit in? Here is the plain-English guide.
What is Microsoft 365? (formerly Office 365)
Microsoft 365 is a cloud-based, subscription version of Microsoft’s productivity suite. Instead of buying a copy of Office outright, you pay a monthly per-user fee for the plan that fits your business, and you always have the latest version.
It includes the core applications everyone knows (Word, Excel, PowerPoint, Outlook and OneNote) plus the cloud services that make them work better together: business email, file storage, collaboration tools, and security and device management. The standalone “Office” app you used to launch the apps from is now simply the Microsoft 365 app.
The key shift is that your apps and data live in the cloud on Microsoft’s servers, so your team can work from the office, from home or on the road, on almost any device, and pick up exactly where they left off.
Microsoft 365 vs the traditional one-off Office
Long-time Office users know the apps inside out. Microsoft 365 keeps that familiarity and adds the cloud. The practical differences:
- How you pay. Microsoft 365 is a subscription (a predictable monthly cost per user). The traditional version (for example Office 2021 or Office 2024) is a one-off purchase of a single, fixed version.
- Updates. With Microsoft 365 you always get the latest features and security updates automatically. With the one-off version you are stuck on that version until you buy the next one.
- Cloud services. Microsoft 365 includes business email, generous cloud storage and collaboration tools. The one-off version is just the desktop apps, with no email hosting or cloud storage included.
For most businesses, the subscription model wins because it removes large upfront costs, keeps everyone on the same up-to-date version, and includes the email and storage you would otherwise pay for separately.
What is included in Microsoft 365 for business
The exact mix depends on your plan, but a business subscription typically includes:
The core apps
Word, Excel, PowerPoint, Outlook and OneNote, on desktop, web and mobile.
Microsoft Teams
Teams is the hub for chat, meetings, calls and teamwork, and it integrates with the rest of your apps. It replaced Skype for Business, which Microsoft retired in July 2021, so if you are still thinking in terms of Skype for Business, Teams is where all of that lives now. Teams can even run your business phone system. See our business phones and Teams Voice work.
SharePoint and OneDrive
SharePoint is your business’s collaborative document and intranet platform, while OneDrive gives each user secure personal cloud storage (typically 1 TB) to save, sync and share files from anywhere.
Exchange (business email)
Professional, hosted email on your own domain, with shared calendars and contacts, all managed for you.
Security and device management
Especially on the higher plans, Microsoft 365 includes built-in protection: threat protection (Microsoft Defender), data loss prevention, and tools to secure and manage company devices (Microsoft Intune).
Copilot AI
Microsoft’s AI assistant is now woven through Microsoft 365 (more on that below).
The Microsoft 365 business plans
Microsoft 365 for business comes in three main tiers, each building on the last:
- Microsoft 365 Business Basic: business email, Teams, and the web and mobile versions of the apps, plus cloud storage. A cost-effective entry point.
- Microsoft 365 Business Standard: everything in Basic, plus the full desktop apps and extras like Clipchamp.
- Microsoft 365 Business Premium: everything in Standard, plus advanced cyber-threat protection and device management. This is the plan we recommend for most businesses that take security seriously, and the one we build on. Here is our executive summary of Business Premium.
A quick note on history, because it still trips people up: when Office 365 became Microsoft 365 in 2020, the plans were renamed too. The old “Business Essentials” became Basic, the old “Business Premium” became Standard, and the plan formerly called “Microsoft 365 Business” became today’s Business Premium.
From 1 July 2026, Microsoft also introduced new plans with Copilot built in (Business Standard with Copilot and Business Premium with Copilot) and adjusted its pricing. Because plans, inclusions and pricing change over time and vary by region, it is worth confirming the current options for your business rather than relying on a number you read online. That is part of what we sort out as your managed Microsoft 365 partner.
Microsoft 365 and AI: where Copilot fits
The biggest change since this guide first ran is AI. Microsoft 365 Copilot is an AI assistant that works inside the apps you already use, drafting in Word, analysing in Excel, summarising your inbox in Outlook and catching you up on a Teams meeting you missed.
A lightweight Copilot Chat is now included with eligible Microsoft 365 subscriptions, while the full Microsoft 365 Copilot is available built into the newer plans or as an add-on.
The appeal is obvious, but Copilot reads the data you already have access to, so the value (and the risk) depends entirely on how well your permissions and data are governed. Before switching it on, it is worth understanding where your data goes and what you are accountable for. We wrote a plain-English guide on exactly that: Claude vs Copilot: which AI is safe for client data?, and we help businesses adopt AI safely through our AI and automation work.
Why businesses move to Microsoft 365
The benefits that matter most to a growing business:
- Focus on the business, not the infrastructure. No servers to buy, maintain or replace, Microsoft runs the platform.
- Scale up or down easily. Add or remove users as your team changes, and only pay for what you use.
- Always current. Everyone is on the latest, secure version of the apps automatically.
- Work from anywhere. Your email, files and apps follow your team across devices, with high availability so they are there when you need them.
- Better collaboration. Real-time co-authoring, Teams and SharePoint make working together simple, whether your people are in the office or remote.
- Built-in security. The right plan gives you enterprise-grade protection without enterprise complexity.
Security and compliance matter (especially in Australia)
Moving to the cloud is not automatically secure. Microsoft 365 gives you powerful security tools, but they need to be configured properly to actually protect you. On Business Premium that means turning on multi-factor authentication, threat protection, data loss prevention and device management, and keeping them aligned to a recognised standard.
We set our clients up to align with the Essential Eight and handle the broader picture through our IT security and compliance and data protection services. If you handle sensitive data, this is the part that turns Microsoft 365 from “convenient” into “defensible”.
Microsoft 365 vs Google Workspace
The other big name is Google Workspace (formerly G Suite). It is a capable, cloud-first suite, but it is primarily online with no full desktop applications. For businesses that want the familiar, powerful desktop versions of Word, Excel and Outlook, that work online and offline, Microsoft 365 is usually the better fit, especially where Office documents and Windows devices are already part of daily work.
Getting set up the right way
Most businesses can move to Microsoft 365 in a matter of days, but doing it well is another matter. The difference between a smooth rollout and a painful one is in the detail: migrating email and files without data loss, configuring security properly, and supporting your team through the change.
Here at Itopia, we help Brisbane businesses move to Microsoft 365 and get the most out of it. We handle the migration, lock down the security, choose the right plan for how you actually work, and stay on hand afterwards so your people are never stuck.
Ready to get Microsoft 365 working properly for your business? Get in touch with the Itopia team today.
Adam leads the Itopia team in Brisbane, helping professional-services firms get secure, productive and confident with their technology, in plain English.