What Is Microsoft 365? Everything You Need to Know in 2026
Microsoft 365 — formerly called Office 365 — is Microsoft's subscription-based productivity suite. It includes the classic Office applications you know (Word, Excel, PowerPoint, Outlook) plus a growing set of cloud services, collaboration tools, and AI features that go well beyond what Office ever was. Here's everything you need to know about what it is, what's included, and whether it's right for you.
What's Included in Microsoft 365
A Microsoft 365 Personal subscription includes the following:
- 1Office Desktop Apps — Full desktop versions of Word, Excel, PowerPoint, Outlook, OneNote and more — always up to date, installed on your PC or Mac.
- 2Mobile Apps — Full-featured Office apps for iPhone, iPad and Android — not just viewers.
- 3OneDrive Cloud Storage — 100GB of secure cloud storage, accessible from any device. Files sync automatically across all your devices.
- 4Microsoft Teams — Video calling, chat, and collaboration for up to 100 participants. Free with your subscription.
- 5Microsoft Copilot — AI-powered writing assistance, data analysis, and content generation built directly into Word, Excel, and PowerPoint.
- 6Web Versions of Apps — Use Word, Excel, and PowerPoint in any browser without installing anything — useful for quick edits or working on shared machines.
Microsoft 365 Plans: Which One Do You Need?
Microsoft offers several plans for different user types. Here are the main consumer options:
Microsoft 365 Consumer Plans Comparison
How Is Microsoft 365 Delivered?
When you purchase Microsoft 365 through a retailer like EvelopKeys, you receive pre-activated account credentials (an email address and password) that give you immediate access to your subscription. Simply go to microsoft365.com, sign in with those credentials, and click "Install apps" to download Word, Excel, PowerPoint, Outlook and the rest. The entire process from purchase to using the apps typically takes less than 5 minutes.
No Product Key Required for Microsoft 365
Unlike Office 2021 which uses a 25-character product key, Microsoft 365 subscriptions purchased through EvelopKeys are delivered as account logins — not keys. You receive an email address and password. Sign in at microsoft365.com and your subscription is already active. No key entry is needed.
The Difference Between Microsoft 365 and Office 2021
The biggest difference is the update model. Office 2021 is a static product — you get the version that shipped and it doesn't gain new features after release (only security patches until 2026). Microsoft 365 is a living product that adds features continuously. In 2026, Microsoft 365 subscribers have access to Copilot AI features, updated collaboration tools, and UI improvements that Office 2021 users don't. If staying current matters to you, Microsoft 365 is the better choice.
What Happens to Your Files if You Cancel?
If you cancel your Microsoft 365 subscription, you don't lose your files. Documents stored in OneDrive remain accessible (though sync stops). The Office desktop apps revert to view-only mode — you can open and read documents but cannot edit them until the subscription is renewed. This gives you plenty of time to export anything you need. Your OneDrive files remain available for 30 days post-cancellation before storage shrinks back to the free 5GB tier.
Microsoft 365 FAQs
Is Microsoft 365 Worth It?
For anyone who uses Office applications regularly across multiple devices, Microsoft 365 Personal delivers exceptional value — especially when factoring in the 100GB OneDrive storage, Teams access, and continuous feature updates. Purchased through EvelopKeys, your subscription is active within minutes. Our lifetime replacement guarantee means if your account credentials ever have an issue, we replace them immediately at no charge.
