Microsoft Entra ID

In this guide, we'll look at the end-to-end process for setting up Microsoft Entra ID (formerly known as Azure Active Directory) with OpenID Connect.

Step 1: Set up a new Entra ID application

From the Entra ID overview page in your Azure portal, click Add → App registration.

Enter any user-facing name for the application. It is recommended that "Cortex" is somewhere in the app's name so it is easily identifiable.

Select "Accounts in this organizational directory only" under Supported account types.

By selecting "Accounts in this organizational directory only," the SSO will only work for the given Entra instance and not for other organizations.

Under Redirect URI (optional), select Web from the dropdown and add https://cortexapp.auth0.com/login/callback as an authorized redirect URI.

Click Register to save the app. You'll then be taken to the app's overview page.

Copy the Application (client) ID - you'll need this information later on.

You can find more detailed instructions on registering an app with the Microsoft identity platform in its quickstart guide.

Step 2: Create a client secret

From the app's Overview page, click "Add a certificate or secret" and then go to the Client secrets tab.

Click New client secret and enter a description and expiration.

The SSO will stop working when the secret expires, so set an expiration that makes sense for your process. If you're in the habit of rotating secrets, a shorter expiration period might make more sense. If you're not, a longer duration will ensure that SSO doesn't break regularly.

Once you've saved the secret, copy the Value - you'll need that later on to set up the OpenID connector in Cortex.

Step 3: Get the metadata document endpoint

Go back to the Overview page and click the Endpoints tab.

Copy the OpenID Connect metadata document up to /v2.0 - this will give you the issuer URI. The issuer URI should be of the format https://login.microsoftonline.com/<uuid>/v2.0.

Do not include a backslash after v2.0 in the issuer URI. This will process as an invalid configuration for the URI.

Step 4: Go to Cortex settings

Go to OpenID Connector settings in Cortex under Authentication and access.

Select Azure under Type and enter the following information:

• Identifier: The Application (client) ID from step 1.

• Secret: The client secret created in step 2.

• Issuer: The issuer URI from step 3.

Once you click save, users will only have the option to sign in to Cortex via Microsoft.