Microsoft Entra ID SSO

Use this guide when your organization signs in with Microsoft Entra ID. Lettermint connects to Entra ID through OpenID Connect.

Before you start

You need permission to create or edit an application registration in the Microsoft Entra admin center. Microsoft requires the Lettermint OIDC callback URL from the SSO guide to be added to the app registration before it will redirect users back to Lettermint.

Entra ID setup

1. Open the Microsoft Entra admin center.
2. Go to Applications > App registrations.
3. Create a new registration or open an existing Lettermint application.
4. Add a Web redirect URI using the Lettermint OIDC callback URL from the SSO guide.
5. Create a client secret.
6. Copy the application client ID, client secret, and tenant ID.

Lettermint setup

In the Lettermint SSO setup screen, choose Microsoft Entra ID and enter:

Replace {tenant} with your tenant ID or tenant primary domain.

References

• Microsoft: Configure OIDC SSO for applications
• Microsoft: OpenID Connect on the Microsoft identity platform