Has Microsoft Office Online Been Replaced by Microsoft 365?

The Short History of Office Online

Microsoft Office Online launched in 2010 as a free, browser-based version of Word, Excel, PowerPoint and OneNote. It allowed anyone with a free Microsoft account to create and edit Office documents online, without installing Office. It was positioned as Microsoft's response to Google Docs and Google Sheets, which were gaining traction as free web-based alternatives to the installed Office suite.

Over time, the naming around Microsoft's productivity products became more complex. Microsoft 365 (originally launched as Office 365 in 2011) was the paid subscription version, while Office Online remained the free browser option. The two co-existed but with different capabilities.

What Happened to Office Online?

Office Online wasn't replaced — it was rebranded and integrated more thoroughly into the Microsoft 365 ecosystem. Today, the browser-based Word, Excel, PowerPoint and OneNote apps are referred to as the Microsoft 365 web apps and are accessible at microsoft365.com (which was previously office.com).

The free tier still exists: anyone with a personal Microsoft account (Outlook.com, Hotmail, Hotmail.co.uk, etc.) can use the web apps for free with some limitations. The full-featured web app experience — with more advanced functionality and commercial use rights — is available to Microsoft 365 subscribers.

Office Online for Free Users vs Microsoft 365 Subscribers

The web apps look very similar for free and paid users, but there are differences:

Free (Personal Microsoft Account)

• Basic Word, Excel, PowerPoint editing in the browser
• 1TB OneDrive storage (free tier is 5GB; 1TB is technically a benefit of Microsoft 365 Personal/Family)
• For personal, non-commercial use
• No business email (Exchange)
• No Teams business features

Microsoft 365 Paid Plans

• Full-featured web apps with more advanced functions
• Commercial use rights — legally licensed for business use
• Integration with Exchange email, SharePoint and Teams
• OneDrive with 1TB+ per user
• Co-authoring with team members using the same Microsoft 365 tenant
• Advanced features like Excel Power Query in the browser, advanced Word formatting, etc.

Is the Free Office Online Suitable for Business?

The free web apps are not licensed for commercial use beyond personal productivity. For a business deploying Microsoft 365, even the entry-level Business Basic plan (£4.60/user/month) provides properly licensed web app access alongside Exchange email, SharePoint, Teams and 1TB OneDrive per user — making the free route inappropriate for business use even if the technical functionality were sufficient.

There's also a practical question of support and governance: free accounts have no admin controls, no IT management capability, no audit logging, and no compliance features. A business running on free personal Microsoft accounts has no ability to control what happens to data when staff leave.

Microsoft 365 Personal and Family: For Home Users

For individuals and home users, Microsoft 365 Personal (approximately £59.99/year) and Microsoft 365 Family (approximately £79.99/year) provide installed Office apps and the full web app experience for non-commercial personal use. These plans are not appropriate for business — they're licensed for personal productivity only.

UK businesses should be on one of the Business plans (Basic, Standard, or Premium). The licensing implications of using personal Microsoft 365 subscriptions for business work are something AMVIA encounters regularly during tenant audits — and it creates both a compliance gap and a data governance problem.

The Current Naming: Office or Microsoft 365?

Microsoft rebranded Office 365 to Microsoft 365 in 2022 and has been progressively updating product names since. The Office desktop applications (Word, Excel, PowerPoint) are still widely called Office apps, but the suite and subscription are now called Microsoft 365. Some products — like Office 365 E3 — were renamed to Microsoft 365 E3. The rebrand is largely cosmetic; the products and features are the same.