Discover if Domain Associated with Entra ID / Microsoft 365

How to determine if a domain leverages Entra ID

Overview

• We can check a particular Microsoft URL to determine if a domain is associated with Entra ID or Microsoft 365 (office)

• In the output, look for the NameSpaceType field and inspect the value:

  • Managed — domain is an Azure AD tenant

  • Federated — domain is associated with an Azure AD tenant but leverages a federation service e.g., Okta, PingID, Active Directory, etc.

  • Unknown — domain not associated with Azure AD tenant

View with Web Browser

View with curl

curl -s 'https://login.microsoftonline.com/getuserrealm.srf?login=<domain-url>&xml=1' | xmllint --format -

View with PowerShell

Documentationaadinternals.com

brew install powershell

pwsh
Install-Module -Name AADInternals
Import-Module -Name AADInternals
Get-AADIntLoginInformation -Domain <domain-url>

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Additional Resources

(Cloud) Tip of the Day: Advanced way to check domain availability for Office 365 and AzureMicrosoftLearn