Microsoft 365, set up correctly, is a secure platform. But the default settings aren't enough for enterprise security. From MFA to Conditional Access, the sound setup of security layers is essential.
01. Mandatory MFA
An enterprise M365 tenant is unthinkable without 2FA or MFA. MFA policies are set up fastest with Security Defaults and most finely with Conditional Access.
02. Conditional Access
Rules like "require MFA if there's access from outside Turkey," "always MFA for an admin account," "block access from outside a protected device." It comes with the Enterprise E3 license.
03. Sign-in Risk Analysis
Microsoft scores login attempts based on behavior (impossible travel, anomalies). High-risk logins can be blocked automatically or require additional verification.
04. DLP (Data Loss Prevention)
DLP rules are defined so that sensitive data (ID number, credit card) doesn't leave via email or OneDrive. It's under Purview.
05. The Zero Trust Approach
The Zero Trust principle: "Trust no device or user by default." The way to build a Zero Trust architecture with M365: continuous verification, least privilege, assume breach.