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Update Service Provider Endpoints After a Login or Site URL Change
When Salesforce acts as an Identity Provider, users can log in to the external service provider or relying party with credentials from your Salesforce org. For example, your users log in to a custom app with their Salesforce credentials or their Experience Cloud site credentials. When your My Domain or site login URL changes, authentication methods that rely on that URL stop working. To restore this authentication method for your users, share the updated endpoints with the third-party service providers.

