Which benefit of Canvas should be considered when exposing external systems from within Salesforce?

The choice emphasizing authorization information via signed Request highlights a crucial aspect of security when interacting with external systems from Salesforce. When the Canvas app is utilized to expose external systems, it ensures that any requests transmitted from Salesforce are accompanied by a signed request that validates the identity of the user and the integrity of the request. This feature is essential for maintaining security and trust, as it prevents unauthorized access and ensures that only legitimate requests are processed by the external system.

This benefit aligns well with the nature of data exchange between Salesforce and third-party applications, as it ensures that sensitive user authorization data is handled securely. In contexts where sensitive customer or organizational data is at stake, having robust authorization measures is of paramount importance to protect against data breaches and to safeguard the integrity of user sessions.

The other options, while they reference useful capabilities of the Canvas framework, do not emphasize the security aspect to the same extent. The capability to mimic Salesforce UI provides a consistent user experience, but it does not inherently address security concerns. The ability to send data asynchronously and the dynamic change of canvas endpoint URLs are features that enhance functionality but still hinge on having secure authorization processes in place. Thus, the focus on authorization via signed requests is critical when exposing external systems in Salesforce.