Technical security controls catch a lot of threats. They do not catch all of them, because some threats do not need to bypass your firewall or defeat your antivirus. They just need one employee to click a link. Attack simulation training addresses the human side of security in a way that generic security awareness training does not.
What Attack Simulation Training Is
Microsoft's Attack Simulation Training, available through Microsoft Defender for Office 365, sends simulated phishing emails to your employees using the same techniques real attackers use. The emails look convincing because they are modeled on actual phishing campaigns. Employees who click a link or enter credentials are identified, and targeted training is automatically delivered to them.
This is different from telling employees about phishing in a presentation. It tests their actual behaviour and responds to what the test reveals.
The Three Phases
Simulate
Administrators configure simulated phishing campaigns and deploy them across the organization. Simulations can be run across the entire organization or targeted at specific departments. Multiple simulation types are available: credential harvesting, malware attachment, link in attachment, drive-by URL, and OAuth consent grant.
Running multiple simulation types over time gives a realistic picture of where your organization is vulnerable, not just whether employees recognize one type of attack.
Educate
Employees who engage with a simulated attack receive immediate, contextual training. Rather than a generic security reminder, the training explains specifically what they encountered, why it looked legitimate, and what they should have noticed. This timing matters. The teachable moment is right after the mistake, not weeks later in a scheduled training session.
Training content can be customized and includes modules from Microsoft and third-party providers covering a range of security topics beyond phishing.
Measure
Reporting shows which employees engaged with simulations, what actions they took, and how click rates change over time as training is delivered. This data helps security and HR teams understand the organization's overall security posture and identify teams or individuals who need additional support.
Tracking improvement over time demonstrates the value of the program and identifies whether certain simulation types or departments consistently show higher risk.
Why This Matters
Phishing is the entry point for the majority of ransomware attacks and data breaches. Technical controls alone cannot prevent every phishing email from reaching an employee. When an employee recognizes an attack and reports it rather than engaging with it, your whole organization benefits from that awareness.
Building a workforce that actively recognizes and reports threats is an investment that compounds. Each successful simulation makes the next real attack more likely to be identified rather than acted on.