Microsoft Defender for Business is often described as an endpoint detection and response (EDR) system.

But its capabilities go beyond traditional endpoint protection.

Defender for Business also includes Microsoft Defender Network Protection, which provides URL and network connection filtering directly at the device level.

This means every network connection made by a company computer can be evaluated for risk.

Protection Wherever the Device Goes

With Defender Network Protection enabled, devices are protected regardless of where they are located.

Any connection a computer attempts to make — whether from the office, a home network, a hotel, or a coffee shop — can be checked against Microsoft's security intelligence systems.

If the device attempts to connect to:

  • Known malicious websites
  • Suspicious domains
  • Command-and-control servers
  • Other high-risk destinations

the connection can be blocked automatically.

Because the protection operates at the endpoint level, it stays with the device no matter where it connects to the internet.

Web Filtering for Company Devices

Microsoft Defender Network Protection can also be used to block categories of websites that may not be appropriate for company devices.

For example, organizations can restrict access to sites related to:

  • Gambling
  • Pornography
  • Other categories that may violate company policies

This helps ensure that corporate devices remain aligned with company security policies regardless of location.

Security That Travels With the Device

Traditional network security relied heavily on perimeter firewalls and web filtering appliances.

But modern work environments involve laptops and mobile devices operating from many different locations.

With Microsoft Defender for Business, web protection and network filtering are applied directly to the device itself.

The result is a security model where protection travels with the endpoint rather than depending on a fixed network perimeter.

Learn More

If you're evaluating how Microsoft Defender, Intune, and Entra ID work together to secure modern IT environments, you may want to review our overview of Microsoft 365 security architecture: https://www.xerillion.com/microsoft-365-it-security-modernization/?