1. Identity & Access
- Enable Multi-Factor Authentication (MFA) for all users.
- Implement Conditional Access policies (block risky sign-ins, enforce compliant devices).
- Review sign-in logs for unusual activity.
2. Device & Endpoint Security
- Ensure all devices are managed via Microsoft Intune.
- Apply OS and app updates regularly.
- Deploy Microsoft Defender for Business for advanced threat protection.
3. Data Protection
- Classify sensitive data using Sensitivity Labels.
- Apply baseline DLP policies for email, Teams, and SharePoint.
- Restrict copy-paste of sensitive data into external apps (via DLP).
4. Email & Collaboration Security
a) Enable Defender for Office 365 features:
- Safe Links
- Safe Attachments
- Anti-phishing policies
b) Train users on phishing awareness.