François-Clément Brossard provides an in-depth guide on setting up OpenID Connect (OIDC) on Elastic Cloud using Azure, Google, or Okta as identity providers, enabling a seamless single sign-on (SSO) experience. OIDC, an authentication layer based on the OAuth 2.0 protocol, utilizes JSON web tokens (JWTs) to communicate user identity between the identity provider and Elastic Cloud services like Elasticsearch and Kibana. The guide walks through the process of generating OAuth client credentials and configuring realms for Elasticsearch and Kibana, with specific instructions for each provider. It also covers creating role mappings to control user access based on email addresses, ensuring secure deployments. The guide notes that OIDC support is available only for Platinum and Enterprise subscriptions, and also mentions alternative authentication methods such as SAML and Kerberos for Elasticsearch Service.