Microsoft 365 provides enterprise-grade security features, but many organizations don't take full advantage of them. Understanding and implementing these basics can significantly improve your security posture.
Essential Security Features
1. Multi-Factor Authentication (MFA)
MFA should be mandatory for all users. Even if a password is compromised, MFA provides a crucial second layer of protection. Microsoft's Authenticator app is free and easy to use.
**Action:** Enable MFA for all user accounts through the Microsoft 365 admin center.
2. Conditional Access Policies
Conditional Access lets you control access based on conditions like location, device compliance, and risk level. For example, you can require MFA when users access from unknown locations.
**Action:** Start with a basic policy requiring MFA for all users, then refine based on your needs.
3. Advanced Threat Protection (ATP)
ATP protects against sophisticated attacks in email and collaboration tools. It includes safe attachments, safe links, and anti-phishing protection.
**Action:** Enable ATP for Exchange Online and SharePoint/OneDrive.
4. Data Loss Prevention (DLP)
DLP policies prevent sensitive information from being shared inappropriately. You can create policies for credit card numbers, social security numbers, or custom content types.
**Action:** Start with template policies for common data types, then customize as needed.
5. Mobile Device Management (MDM)
If employees access Microsoft 365 from mobile devices, MDM helps ensure those devices meet security requirements.
**Action:** Enroll devices and set policies for encryption, PIN requirements, and app management.
Best Practices
User Education
Technology alone isn't enough. Regular security awareness training helps employees recognize phishing attempts and follow security best practices.
Regular Security Reviews
Microsoft provides security scores and recommendations. Review these monthly and implement suggested improvements.
Least Privilege Access
Give users only the permissions they need. Regularly review admin accounts and consider using Privileged Identity Management for temporary elevated access.
Email Security
Configure Exchange Online Protection settings to filter spam and malware. Enable external email warnings to help users identify messages from outside the organization.
Audit Logging
Enable audit logging to track activities across Microsoft 365. This helps with compliance and investigating security incidents.
Common Mistakes to Avoid
Getting Started
If you haven't configured these settings, start with MFA and work through the list. Microsoft's security dashboard provides a roadmap with specific recommendations for your tenant.
For organizations that need help, a managed IT provider can configure these settings, monitor security, and provide ongoing guidance.
Need Help?
Microsoft 365 security can be complex. iSeries Integrated Solutions specializes in Microsoft 365 security configuration and can help ensure your organization is properly protected.