To integrate B2B SSO (Single Sign-On) into your custom UI with Ory, you'll need to follow these steps: 1. First, ensure you're on an Enterprise plan that supports SAML SSO, as this feature is only available on select Enterprise plans. If you need SAML support, you'll need to [contact Ory](https://www.ory.sh/contact/). 2. Create an organization for B2B SSO in your Ory project. You can do this through the Ory Console or via API. 3. Set up a SAML or OIDC connection for the organization. This involves configuring the SSO provider details and mapping attributes. 4. In your custom UI, you'll need to implement the login flow that supports SSO. This typically involves: - Creating a login flow - Rendering the UI based on the flow data - Handling the SSO option in your UI 5. When a user enters an email associated with an organization that has SSO enabled, you should display a "Sign in with SSO" option instead of the regular password field. 6. Implement the logic to redirect the user to the appropriate SSO provider when they choose to sign in with SSO. Here's a basic example of how you might render the SSO option in React:

jsx import { useEffect, useState } from "react" import { Configuration, FrontendApi, LoginFlow } from "@ory/client"  const frontend = new FrontendApi(   new Configuration({     basePath: "<https://your-project.projects.oryapis.com>",     baseOptions: {       withCredentials: true,     },   }), )  function LoginForm() {   const [flow, setFlow] = useState<LoginFlow>()    useEffect(() => {     frontend.createBrowserLoginFlow().then(({ data: flow }) => setFlow(flow))   }, [])    return flow ? (     <form action={flow.ui.action} method={flow.ui.method}>       {/* Render your login form fields here */}       {/* If SSO is available for the entered email, show SSO button */}       {flow.ui.nodes.some(node => node.group === "oidc") && (         <button type="submit" name="method" value="oidc">           Sign in with SSO         </button>       )}     </form>   ) : (     <div>Loading...</div>   ) }

For more detailed information on implementing custom UIs with Ory, including how to handle different authentication methods, you can refer to the following resources: - [Custom UI Overview](https://www.ory.sh/docs/kratos/bring-your-own-ui/custom-ui-overview) - [Integration Basics](https://www.ory.sh/docs/kratos/bring-your-own-ui/custom-ui-basic-integration) - [B2B Single Sign-On & SAML](https://www.ory.sh/docs/kratos/organizations/) Remember that the exact implementation will depend on your specific setup and requirements. You may need to adjust the code and flow based on your particular use case and the SSO providers you're integrating with.