Your Microsoft 365 Is Probably Not Secure — Here’s What to Fix First
Microsoft 365 is the backbone of most small business operations — email, documents, Teams, everything. It’s also one of the most frequently compromised platforms in the SMB space, not because Microsoft’s security is bad, but because the default settings prioritize ease of setup over real protection.
1. Multi-Factor Authentication on Every Account
Non-negotiable. MFA stops the vast majority of credential-based attacks. If an attacker gets your password through phishing or a data breach, MFA means they still can’t log in without your phone. Enforce it for every user, including administrators, with no exceptions.
2. Conditional Access Policies
Conditional access lets you define rules around who can access Microsoft 365 resources and under what conditions — block sign-ins from countries you don’t do business in, require compliant devices, flag logins from unknown locations. Available in Microsoft 365 Business Premium and above.
3. Email Authentication Records (SPF, DKIM, DMARC)
Without these DNS records, anyone can send email that appears to come from your domain — the foundation of vendor impersonation and CEO fraud attacks. Setting these up is a one-time fix that protects your domain permanently.
4. External Email Warning Tags
By default, Microsoft 365 doesn’t visually distinguish between an internal email and one from outside your organization. Enabling external sender tags adds a clear notice to every email from an external sender — a simple change that meaningfully reduces phishing success rates.
5. Admin Account Separation
Global administrator accounts should never be used for day-to-day work. Every admin should have a dedicated admin account used only for administrative tasks, protected with MFA using an authenticator app. A compromised admin account is a full tenant compromise.
Check Your Secure Score
Microsoft’s built-in Secure Score tool inside the 365 admin center grades your environment and gives you a prioritized list of improvements. If your score is below 50%, you have meaningful gaps worth addressing. Contact us if you’d like a review of your current environment.