Your business probably runs on more cloud apps than you realize: email, accounting, file sharing, CRM, payroll, scheduling. Each one holds a piece of your company’s data, and each one is only as secure as the way you use it.
Cloud providers invest heavily in security, but they operate under a shared responsibility model. They secure the infrastructure. You are responsible for who can log in, what they can access and whether your data can be recovered. Most cloud breaches happen on the customer’s side of that line.
The rules
Rule 1: Every login gets multifactor authentication
Stolen passwords are the most common way into cloud accounts, because cloud apps are reachable from anywhere by design. Turn on MFA for every app that supports it, starting with email, file storage, finance and admin accounts. Where possible, use single sign-on so users have one well-protected identity instead of dozens of separate passwords.
In the cloud, your login page is your front door, and it faces the entire internet.
Rule 2: Give people only the access they need
Over time, permissions pile up. Former employees keep accounts, everyone is an admin “to make things easier” and files are shared with “anyone with the link.” Review access regularly and remove what is not needed.
- Offboard immediately: Disable accounts the day someone leaves.
- Limit admins: Only a few people need administrator rights, with separate admin accounts.
- Audit sharing: Look for public links and external sharing on sensitive folders.
- Review third-party apps: Remove integrations that have access to your data but are no longer used.
Rule 3: Back up your cloud data yourself
Many businesses assume the provider backs everything up. Providers do protect against their own hardware failures, but they are not designed to recover you from accidental deletion, a malicious insider or ransomware that syncs encrypted files. Retention windows are limited. A third-party backup for Microsoft 365, Google Workspace and other critical apps gives you your own recoverable copy.
Keep a simple inventory: list every cloud app, what data it holds, who the admin is and whether MFA and backups are in place. Just writing it down reveals most of your gaps.
Simple rules, big payoff
These three rules apply to every cloud service, from the biggest platforms to the small niche tool your team adopted last month. Apply them consistently and you remove the most common causes of cloud data loss.
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