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Give Integration Users API Only Access
Following the principle of least privilege, we recommend creating and configuring one Salesforce user for every integration. By assigning a different user to each calling system, domain, use case, or API resource, you restrict each of those users to a unique subset of data and functionality. Setting up dedicated integration users gives you more control over operations and traceability of transactions. And it minimizes the impact if a user or integration is compromised. The Salesforce Integration user license supports this best practice by offering a profile that restricts assigned users to API-only access, ideal for system-to-system integration users.

