Single Sign-On from an External Identity Provider

You can set up single sign-on (SSO) so that users can access Salesforce without logging in again. This mechanism is called inbound SSO. Likewise, you can set up outbound SSO so that users who are logged in to Salesforce can access third-party apps and other services without logging in again.

Salesforce supports SSO from third-party identity providers. For SSO to work, you need an identity provider and a service provider to coordinate authentication and authorization information using SAML assertions.

For more information about SSO, refer to these resources.