What must be installed to run high-volume automation on a legacy web application?

To run high-volume automation on a legacy web application, the on-premises data gateway is essential. This component acts as a bridge, allowing secure communication between on-premises data (such as that from legacy applications) and cloud services like Power Automate. When automating processes that involve legacy systems, the gateway ensures that data can flow freely and securely, enabling Power Automate to integrate with these applications effectively.

The need for an on-premises data gateway stems from situations where the legacy application does not have direct access to cloud-based tools. By using the gateway, organizations can maintain security protocols and compliance while still leveraging automation capabilities. This is particularly crucial when handling sensitive or critical business data, ensuring that actions taken through automation are compliant with organizational and regulatory standards.

The other options serve different purposes in the automation and software development landscape. For example, Postman is used for API testing and development, and while it might assist in configuring integrations, it does not facilitate automation directly. Process advisor helps analyze processes but is not a requirement for running automation. Microsoft Power Apps Build Tools support application development and CI/CD (continuous integration/continuous deployment) processes but are irrelevant for the automation of legacy applications.