Domain Inspector

Verify Microsoft 365 Tenant ID, Federation State, and Identity Provider Details. Quickly ascertain whether a domain is managed or federated, its tenant ID, and SAML/OAuth endpoints.

Inspect Domain

Try example:

Overview

Target Domain--

Microsoft 365 Tenant ID

Not Found / N/A

Namespace Type--

Federation Status--

Brand Name--

Cloud Environment--

Endpoints

Federation Auth URL (IdP / SAML)

None

STS Auth URL (SOAP / ECP)--

SAML Entity ID--

Signing Certificates--

SAML & OAuth Endpoints

Endpoint Type	Binding Protocol	Target URL Location

How to Use Domain Inspector

Enter the domain name (e.g. attosol.com) or an email address in the input field above.
Click the "Inspect" button to retrieve the Microsoft 365 tenant and federation details.
If the domain is managed by Microsoft 365, you will see its tenant ID and namespace type.
If the domain is federated, you will see the authentication endpoints used by the Identity Provider.

Frequently Asked Questions (FAQ)

What is a Tenant ID?

A Tenant ID is a unique globally unique identifier (GUID) that represents your organization in Azure Active Directory (Azure AD) / Entra ID. It is required for many API and administration operations.

What does "Federated" mean?

A federated domain means that authentication is delegated to a third-party Identity Provider (IdP) such as ADFS, Okta, or Ping Identity, rather than being handled natively by Microsoft.

Why am I not seeing any data?

If no data is shown, it's highly likely that the domain does not use Microsoft 365 / Entra ID for its identity management, or the public discovery endpoints are disabled.