Azure External Attack Surface Management Skill

This skill provides expert guidance for Azure External Attack Surface Management. Covers limits & quotas, configuration, and integrations & coding patterns. It combines local quick-reference content with remote documentation fetching capabilities.

How to Use This Skill

IMPORTANT for Agent: Use the Category Index below to locate relevant sections. For categories with line ranges (e.g., L35-L120), use read_file with the specified lines. For categories with file links (e.g., [security.md](security.md)), use read_file on the linked reference file

IMPORTANT for Agent: If metadata.generated_at is more than 3 months old, suggest the user pull the latest version from the repository. If mcp_microsoftdocs tools are not available, suggest the user install it: Installation Guide

This skill requires network access to fetch documentation content:

• Preferred: Use mcp_microsoftdocs:microsoft_docs_fetch with query string from=learn-agent-skill. Returns Markdown.
• Fallback: Use fetch_webpage with query string from=learn-agent-skill&accept=text/markdown. Returns Markdown.

Category Index

Category	Lines	Description
Limits & Quotas	L31-L35	Explains how Defender EASM billing works, what counts as a billable asset, and how asset counts affect costs and quotas.
Configuration	L36-L49	Filtering and querying EASM inventory by asset type (domains, hosts, IPs/blocks, ASNs, pages, contacts, SSL certs) and configuring policy engine automation rules.
Integrations & Coding Patterns	L50-L53	Configuring Defender EASM to export discovery and asset data into Log Analytics and Azure Data Explorer, including connection setup and data usage for analysis.

Limits & Quotas

Topic	URL
Understand Defender EASM billing and billable asset counts	https://learn.microsoft.com/en-us/azure/external-attack-surface-management/understanding-billable-assets

Configuration

Topic	URL
Use ASN asset filters in Defender EASM inventory	https://learn.microsoft.com/en-us/azure/external-attack-surface-management/asn-asset-filters
Use contact asset filters in Defender EASM inventory	https://learn.microsoft.com/en-us/azure/external-attack-surface-management/contact-asset-filters
Apply domain asset filters in Defender EASM inventory	https://learn.microsoft.com/en-us/azure/external-attack-surface-management/domain-asset-filters
Apply host asset filters in Defender EASM inventory	https://learn.microsoft.com/en-us/azure/external-attack-surface-management/host-asset-filters
Use Defender EASM inventory filters and saved queries	https://learn.microsoft.com/en-us/azure/external-attack-surface-management/inventory-filters
Use IP address asset filters in Defender EASM	https://learn.microsoft.com/en-us/azure/external-attack-surface-management/ip-address-asset-filters
Use IP block asset filters in Defender EASM	https://learn.microsoft.com/en-us/azure/external-attack-surface-management/ip-block-asset-filters
Apply page asset filters in Defender EASM inventory	https://learn.microsoft.com/en-us/azure/external-attack-surface-management/page-asset-filters
Configure Defender EASM policy engine automation rules	https://learn.microsoft.com/en-us/azure/external-attack-surface-management/policy-engine
Use SSL certificate asset filters in Defender EASM	https://learn.microsoft.com/en-us/azure/external-attack-surface-management/ssl-certificate-asset-filters

Integrations & Coding Patterns

Topic	URL
Configure Defender EASM data connections to Log Analytics and ADX	https://learn.microsoft.com/en-us/azure/external-attack-surface-management/data-connections