How can AD B2C Single Logout be implemented with a subdomain?

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To implement AD B2C Single Logout with a subdomain, follow these steps:

1. First, set up a custom domain for your AD B2C tenant, including a subdomain. For example, if the domain is "example.com", create a subdomain like "login.example.com".

2. Configure the front-end application to redirect to the subdomain when initiating the login process.

3. When the user logs out, the front-end application should initiate the sign-out process by sending a sign-out request to the custom domain, including the subdomain (e.g., "https://login.example.com").

4. Configure the AD B2C tenant to accept sign-out requests from the front-end application's subdomain. This can be done in the "Reply URLs" section of the tenant's settings.

5. Once the sign-out request is received, the AD B2C tenant will clear the user's session and redirect them back to the front-end application's subdomain.

By following these steps, you can implement AD B2C Single Logout with a subdomain for your front-end application.