This is the Trace Id: 37d6498c6c1c3f7535fb11ebb90311c7
Skip to main content
Microsoft Security

Join Microsoft Pre-Day at RSACTM 2026 to hear from security experts and network with peers.

Register now

Microsoft Defender External Attack Surface Management (EASM)

See your business the way an attacker can.
OVERVIEW

Continuous visibility beyond the firewall

See your rapidly changing, global external attack surface in real time with Defender EASM.
  • Understand the full extent of your attack surface, including shadow IT and assets created through common, everyday business growth.
    Two coworkers looking at a laptop screen
  • Maintain a dynamic inventory of external resources across multiple cloud and hybrid environments.
    Person monitoring systems at a workstation with multiple displays
  • Prioritize vulnerabilities and misconfigurations hidden in unmanaged resources, then bring the resources under management to remove those exposures.
    Two colleagues collaborating at a table using a Surface laptop
How it works

Uncover your external attack surface

Get complete visibility into internet-exposed assets with code-level discovery through a global network that graphs online relationships.
Capabilities

Microsoft Defender EASM capabilities

Discover, classify, and prioritize exposed weaknesses in the cloud, software as a service (SaaS), and infrastructure as a service (IaaS) resources to strengthen security posture.
Use dynamic, always-on inventory monitoring to find, analyze, and categorize external-facing resources as they appear.
Contoso IT inventory list showing approved assets.
Back to tabs
RESOURCES

Documentation and training

Person working on laptop with multiple monitors displaying analytics and data visualizations.
Get started

Protect everything

Make your future more secure. Explore your security options today. 

Follow Microsoft Security