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Version: 2.2.1-preview

AD-DC-01 - DC site coverage count should be retrievable

Michael SouleMerill Fernando
Contributed by Michael Soule with Merill FernandoAll contributors →

Overview​

Active Directory sites are used to define the physical topology of your network and optimize authentication traffic. Understanding site coverage helps ensure:

  • Geographic redundancy: Authentication services are available in all locations
  • Network efficiency: Clients authenticate to the nearest DC
  • Disaster recovery: Multiple sites provide failover capabilities
  • Capacity planning: Proper distribution of DCs across sites

Sites without domain controllers may indicate:

  • Hub-and-spoke topology where remote sites rely on central DCs
  • Misconfigured site topology
  • Missing DCs in satellite offices

Security Recommendation​

Review your site topology regularly to ensure all locations have adequate DC coverage. Consider placing at least one DC in each major geographic location to ensure authentication resilience.

How the Test Works​

This test retrieves all domain controllers and counts the unique sites that contain at least one DC. It compares this to the total number of sites in the domain.

  • Test-MtAdDomainControllerCount - Total count of domain controllers
  • Test-MtAdDcOperatingSystemDetails - DC OS distribution information

Test Metadata​

FieldValue
Test IDAD-DC-01
SeverityInfo
SuiteActive Directory
CategoryAD.DomainController
PowerShell testTest-MtAdDcSiteCoverageCount
TagsAD, AD-DC-01, AD.DomainController

Source​

  • Pester test: tests/ad/domaincontroller/Test-MtAdDcSiteCoverageCount.Tests.ps1
  • PowerShell source: powershell/public/ad/domaincontroller/Test-MtAdDcSiteCoverageCount.ps1