Here's a question that catches a lot of business owners off guard: if your email and files are in Microsoft 365, are they backed up? Most people assume yes — it's the cloud, Microsoft runs it, surely they've got it covered. The reality is more nuanced, and misunderstanding it is one of the most common — and costly — data mistakes small businesses make.
The shared responsibility model
Microsoft operates under what's called a shared responsibility model. In plain terms: Microsoft is responsible for keeping the service running and available. You are responsible for your data — protecting it, retaining it, and being able to recover it. Microsoft even recommends that customers regularly back up their content and data using third-party services in its Services Agreement.
In other words, Microsoft makes sure the platform is up. It does not guarantee it will bring back data you lost to an accidental deletion, a disgruntled employee, or a ransomware attack — especially once retention windows pass.
What Microsoft 365 does and doesn't protect against
Microsoft 365 has some built-in retention features — a recycle bin, limited version history, retention policies. These help with minor, recent mistakes. But they have real gaps:
- Accidental or malicious deletion — if a file or mailbox is deleted and the retention window passes, it can be gone for good.
- Ransomware — if malware encrypts your files, syncing spreads the damage; native retention may not save you.
- Departing employees — when you remove a licence, that user's data can be lost if not preserved first.
- Long-term retention — native windows are limited; compliance or business needs often require far longer.
A dedicated backup fills every one of these gaps.
What a proper Microsoft 365 backup gives you
A third-party backup for Microsoft 365 continuously copies your Exchange (email), OneDrive, SharePoint, and Teams data to a separate, secure location — independent of Microsoft. That means:
- Fast, granular recovery — restore a single email, file, or an entire mailbox.
- Ransomware resilience — a clean copy that isn't affected by an attack on your live tenant.
- Long retention — keep data as long as your business or compliance rules require.
- Peace of mind — a real safety net, not an assumption.
This applies to Google Workspace too
The same shared-responsibility principle applies to Google Workspace. If your business runs on Gmail and Google Drive, your data needs an independent backup for exactly the same reasons.
The bottom line
Moving to Microsoft 365 is one of the best things a small business can do — but "it's in the cloud" is not the same as "it's backed up." Microsoft keeps the lights on; protecting and recovering your data is on you. A dedicated backup is inexpensive insurance against a very expensive problem.
We manage secure, verified backups of Microsoft 365 tenants and devices as part of our cloud & endpoint backup service. Want to make sure your data is actually protected? Book a free evaluation.
Reference: Microsoft Services Agreement and Microsoft's shared responsibility guidance (learn.microsoft.com).