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  1. Home
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  3. Microsoft Defender External Attack Surface Management
Logo of Microsoft Defender External Attack Surface Management

Microsoft Defender External Attack Surface Management

byMicrosoft
in External Attack Surface Management
4.3

Overview

Product Information on Microsoft Defender External Attack Surface Management

Updated 14th October 2025

What is Microsoft Defender External Attack Surface Management?

Microsoft Defender External Attack Surface Management software is designed to help organizations identify, assess, and monitor external-facing digital assets such as domains, IP addresses, and cloud services. The software provides continuous discovery of internet-exposed resources and evaluates potential vulnerabilities that may be exploited by malicious actors. It aggregates and analyzes data to help security teams understand and manage their external attack surface, enabling proactive security measures. The software supports risk prioritization and remediation workflows to reduce exposure and address vulnerabilities before they can be leveraged in cyber attacks. It aims to support organizations in strengthening their overall security posture by providing visibility and insights into external risks.

Microsoft Defender External Attack Surface Management Pricing

Microsoft Defender External Attack Surface Management software uses a subscription-based pricing model, typically structured per user or per resource being monitored. The software may offer different tiers based on the required feature set and the scale of external assets being tracked, with charges varying according to organization size and deployment options. Pricing information is made available through direct inquiry or via volume licensing agreements.

Overall experience with Microsoft Defender External Attack Surface Management

DIRECTOR OF IT INNOVATION
500M - 1B USD, Manufacturing
FAVORABLE

“Comprehensive Asset Visibility Balanced By Need For Filtering And Custom Reporting”

4.0
Aug 28, 2025
We've had a generally positive experience using Microsoft Defender EASM - we like the deep integration with the Microsoft security stack (including Defender for Cloud, Defender XDR, and Sentinel), the integrated dashboards that surface vulnerabilities, exposures, and compliance metrics, and the comprehensiveness of the solution.
BUSINESS DEVELOPMENT MANAGER
250M - 500M USD, Miscellaneous
CRITICAL

“Effective Alerts and Notifications”

3.0
Nov 14, 2025
Overall it was a solid app to help protect your computer and services from unwanted attacks. It fits right in line with other products similar to it - it doesnt stand out as the clear leader nor does it sit at the bottom of the pack.

About Company

Company Description

Updated 11th August 2023

Microsoft enables digital transformation for the era of an intelligent cloud and an intelligent edge. Its mission is to empower every person and every organization on the planet to achieve more. Microsoft is dedicated to advancing human and organizational achievement. Microsoft Security helps protect people and data against cyberthreats to give peace of mind.

Company Details

Updated 25th March 2024
Company type
Public
Year Founded
1975
Head office location
Redmond, Washington, United States
Number of employees
10000+
Annual Revenue
30B+ USD
Website
https://microsoft.com

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Key Insights

A Snapshot of What Matters - Based on Validated User Reviews

Reviewer Insights for: Microsoft Defender External Attack Surface Management
Deciding Factors: Microsoft Defender External Attack Surface Management Vs. Market Average
Performance of Microsoft Defender External Attack Surface Management Across Market Features

Microsoft Defender External Attack Surface Management Likes & Dislikes

Like

We selected Microsoft Defender EASM primarily because of the comprehensiveness of the external visibility the solution provides for assets (domains, IP blocks, and third-party dependencies) and the deep integration with the rest of our Microsoft technology landscape. For users of Defender for Cloud, Defender XDR, and Sentinel, which we use in our organization, this integration was relatively seamless and provided consolidation of our security workflows and observability.

Like

I really appreciated and liked the alerts/updates it would give me to let me know my services are protected. There are far too many instances where I would get notifications from other places in time or they would build up over time.

Like

What I really like the most about EASM is the automated discovery of unknown and unused assets in the system. It is now really common to have internet based assets in the organisation that we are unaware of like testing environments, old domains, This tool is really helpful in disclosing such assets which are not noticed in regular system check-ups. EASM also makes this process really fast and simple. Like recently one more case came where we established a testing environment a long time ago and it remained in the blind spot until EASM flagged it. Also the UI is really basic and easy to understand even for a beginner in admin task management.

Dislike

Since Microsoft EASM provides a considerable amount of information about your security attack surface, we needed to train our end users to focus on the key metrics and weed out information about outdated / irrelevant assets that may not be vital to our security reporting, such as expired certificates. Additionally, as part of the information filtering process, we identified numerous areas where false positives were being reported by the tool, so we had to address those manually to ensure the data was correct and pertinent to our reporting needs. We also had to create some custom reports using Log Analytics which went into the level of specificity we were looking for around certain types of metrics, as the out-of-the-box dashboards lacked details that are important to our organization.

Dislike

What I disliked most was that some of the settings were buried deeper in menus than I would have liked. It took much longer to be able to find some of the things I needed compared to other programs.

Dislike

I haven't faced any issues as of now and there is no such major problem or any drawback. But it can be a bit tricky to set up filters.

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Peer Discussions

Microsoft Defender External Attack Surface Management Reviews and Ratings

4.3

(153 Ratings)

Rating Distribution

5 Star
40%
4 Star
50%
3 Star
10%
2 Star
0%
1 Star
0%
Why ratings and reviews count differ?

Customer Experience

Evaluation & Contracting

4.3

Integration & Deployment

4.5

Service & Support

4.3

Product Capabilities

4.4

Filter Reviews
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  • DIRECTOR OF IT INNOVATION
    50M-1B USD
    Manufacturing
    Review Source

    Comprehensive Asset Visibility Balanced By Need For Filtering And Custom Reporting

    4.0
    Aug 28, 2025
    We've had a generally positive experience using Microsoft Defender EASM - we like the deep integration with the Microsoft security stack (including Defender for Cloud, Defender XDR, and Sentinel), the integrated dashboards that surface vulnerabilities, exposures, and compliance metrics, and the comprehensiveness of the solution.
  • Teamcenter Developer
    <50M USD
    IT Services
    Review Source

    Microsoft Defender EASM Detects Forgotten Assets and Exposed Legacy Services Effectively

    5.0
    Aug 11, 2025
    My experience with Microsoft Defender EASM is really good. It is really useful for finding unmanaged and unknown components in the system which can cause security issues. The feature that I use the most and which is really helpful is the tool’s ability to find unknown and shadow IT assets automatically. For example, in the very first EASM Scan on the system, it detected legacy services that are still publicly accessible which were already replaced by new services. These outdated and unused services discovered by EASM can be an easy attack point.
  • ENGINEER
    1B-10B USD
    Energy and Utilities
    Review Source

    Clear Dashboards Increase Visibility Despite Initial Complexity in Asset Classification

    4.0
    Sep 12, 2025
    Microsoft Defender external attached surface management has given us much needed visibility into our organization's internet-facing assets. Within the first few weeks we identified multiple forgotten domains and misconfigured endpoints that posed potential risks. The tool's dashboards are clear and the integration with defender for cloud allows us to quickly prioritize remediation efforts. setup required some time and coordination across teams, but the outcome has been a significant reduction in unknown exposures.
  • CLOUD APPLICATION SECURITY ENGINEER
    Gov't/PS/Ed
    Education
    Review Source

    Asset Discovery Strong Yet Dashboard Can Slow With Larger Inventories And Noise

    4.0
    Sep 11, 2025
    My experience with Microsoft Defender EASM has been positive overall. The tool has been useful primarily in understanding what endpoints I have that are available publically over the internet. This has helped support our security teams efforts to reduce and confirm internet-facing assets.
  • CLIENT SERVICE SPECIALIST
    50M-1B USD
    Banking
    Review Source

    Microsoft Defender Efficiently Filters Complex Phishing Emails From Leaked Work Accounts

    4.0
    Aug 22, 2025
    Overall, the Microsoft Defender External Attack Surface Management System has been very helpful in catching phishing emails as they come in. My work email has been leaked so over the past year with my company, I've gotten many phishing emails. While some were very obvious, others were more complex and seemed legit upon first glance. This program became very efficient in weeding out the harder-to-spot emails.
...
Showing Result 1-5 of 199

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