Microsoft Defender for Business explained

More and more SMEs are encountering Microsoft Defender for Business, often because it is already included in their Microsoft 365 subscription. But what does it actually do, and is it more than "just a virus scanner"? In this article we explain in plain language what Microsoft Defender for Business is, what it means for your business and why the setup is just as important as the software itself.

What is Microsoft Defender for Business?

Microsoft Defender for Business is a security package from Microsoft built specifically for SMEs. It protects the devices in your business, your laptops, PCs, phones and servers, against cyberattacks such as viruses, ransomware and hacking attempts.

In the past, this kind of advanced protection was mainly reserved for large organisations with their own IT department and a substantial budget. Microsoft has now simplified that technology and made it affordable for businesses with roughly 10 to 150 employees, without needing a team of security specialists in-house.

In technical jargon this is called an endpoint security solution with EDR. That sounds complicated, but it comes down to this: every device (an "endpoint") is continuously monitored, and suspicious behaviour is automatically detected and dealt with. EDR stands for Endpoint Detection and Response, in other words: detecting and responding to attacks.

What exactly does Microsoft Defender for Business do?

The package bundles several layers of protection that work together. Here are the most important ones.

Next-gen antivirus

The foundation is a modern virus scanner that blocks malware. "Next-gen" means it doesn't just recognise known viruses from a list, but also spots suspicious behaviour. That way even a new, as yet unknown threat is stopped before it can do any damage.

EDR: detecting and stopping attacks

This is where the real difference lies. Defender for Business continuously keeps an eye on what's happening on your devices. If a program starts behaving strangely, for example encrypting files as ransomware does, the system raises the alarm and can isolate the attack immediately. That way you prevent one infected device from dragging down your entire network.

Automatic response

An attack can happen incredibly fast, often outside office hours. That's why Defender for Business can step in on its own: putting a suspicious file in quarantine, isolating an infected device or stopping a process. This happens automatically, so there doesn't need to be someone at the controls first.

Threat & vulnerability management

Many attacks succeed simply because an update is missing somewhere or a setting is wrong. Defender for Business scans your devices for these kinds of weak spots and shows you where you're vulnerable. That way you can close gaps before an attacker finds them.

Reducing the attack surface

Finally, the package helps shrink the "attack surface": all the ways an attacker could get in. By blocking certain risky actions by default, you give hackers fewer opportunities. Think of stopping malicious macros in documents or suspicious scripts.

The difference from ordinary (consumer) antivirus

Maybe you're currently using a well-known virus scanner you once bought for home use. The difference with Microsoft Defender for Business is significant.

• Ordinary antivirus runs on a single device and mainly checks whether known viruses come by. It has no idea what's happening on other devices.
• Defender for Business looks at all your devices together, recognises attack patterns across multiple devices and can respond centrally.
• With consumer antivirus, the user has to be notified and act themselves. Defender for Business can step in automatically.
• With Defender for Business you have a central overview: you (or your IT partner) can see in a single dashboard how secure all devices are.

In short: ordinary antivirus is a lock on the front door. Defender for Business is a lock, plus cameras, plus a security guard who steps in when something goes wrong.

Who is it for and how does it fit into the licences?

Microsoft Defender for Business is made for SMEs and supports up to 300 users. That makes it a great fit for a business of 10 to 150 employees.

You can purchase it in two ways:

• As a standalone licence, per user. Handy if you've arranged your email and Office environment elsewhere but want to scale up your security.
• As part of Microsoft 365 Business Premium. This is the most commonly chosen package among SMEs, because Defender for Business is simply included here, together with Office, Teams, email and extra security features.

That second option is often the most cost-effective. Many businesses already pay for Microsoft 365 and therefore already have Defender for Business at their fingertips, without using it. That's a shame, because the protection is then ready and waiting but doing nothing.

Not sure which package and licences suit your situation? On our page about Microsoft 365 security licences we help you make the right choice.

Why Defender for Business fits NIS2 and security requirements

Whether it's through the new NIS2 legislation or through your clients' requirements: working demonstrably securely is increasingly becoming mandatory. Microsoft Defender for Business helps you with this on several fronts.

• It provides appropriate technical measures to protect devices, a core requirement within NIS2.
• It keeps track of what happens and stores that data, so you can investigate an incident and report it if necessary.
• It provides insight into vulnerabilities, so you can tackle risks structurally instead of waiting around.

This makes Defender for Business an important building block for meeting modern security requirements. It is not a complete NIS2 solution in itself, but it does deliver a large part of the protection you need anyway.

Note: proper setup makes the difference

And now for the most important point. Microsoft Defender for Business is powerful, but only if it is set up and managed properly. In practice we often see that the package is included in the licence but has never really been switched on or correctly configured. In that case the protection is only half there, and you think you're safe when you're not.

Proper setup means, among other things:

• Activating and correctly configuring all layers of protection.
• Rolling it out to all devices, including phones and home workstations.
• Setting the right rules for automatic response.
• Following up on alerts, because a notification only matters if someone acts on it.

This isn't a one-off job. Threats change constantly, so the monitoring and management have to be ongoing. For an SME without its own IT department, that's hard to keep up with on your own. And that's exactly where things often go wrong.

How IT-gemak helps

At IT-gemak we make sure Microsoft Defender for Business is not only switched on, but actually does its job for your business.

• With our Microsoft Security services we set up Defender for Business completely and tailor it to your organisation.
• We arrange the right Microsoft 365 security licences, so you don't overpay and don't miss anything.
• With our broad IT security we monitor your environment and step in when needed, so you don't have to worry.

As a Microsoft Partner, we know this technology inside out. We translate it into clear, practical protection, in plain language and without unnecessary bells and whistles.

Ready to get started with Microsoft Defender for Business?

Want to know whether your business already has Defender for Business and whether it's set up correctly? We're happy to take a look with you and tell you in plain language where you stand and what the smartest steps are.

Schedule a no-obligation consultation and discover how to make your devices truly secure, without the hassle.