Connect Two Salesforce Orgs by using Named Credentials, Authentication Provider, and Connected App 

What is Named Credentials in Salesforce?
Named Credentials are a secure way to authenticate to external services or endpoints, such as web services or APIs. They allow you to store authentication details separately from your code or configuration, providing a more secure and maintainable approach to handling external integrations.
What is Auth Provider in Salesforce?
In Salesforce, an Auth Provider (Authentication Provider) is a feature that allows you to integrate external identity providers with your Salesforce org for user authentication.
Connected App • What is Connected APP ...
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