A company uses Dynamics 365 Finance. The company has several integrations with Dynamics 365 Finance that use REST web services. You must perform unit testing on the web services before you promote the

Azure DevOps is a CI/CD and project management platform used to orchestrate builds and deployments, not a tool for manually sending and inspecting REST web service requests.

Dynamics 365 task recordings capture UI-level interactions for test automation and documentation purposes, and cannot be used to directly invoke or validate REST web service endpoints.

SoapUI is an industry-standard tool for manually testing both REST and SOAP web services - it allows testers to construct HTTP requests, set headers and payloads, and validate responses, making it a complete standalone solution for REST API unit testing before promotion to a build environment.

Regression Suite Automation Testing (RSAT) is designed for automated functional end-to-end testing of Dynamics 365 by replaying task recordings, not for manually unit testing individual REST web service calls.

Postman is a widely used REST API client that enables developers to manually craft and send HTTP requests, inspect responses, set authentication parameters, and organize tests into collections, providing a complete solution for unit testing Dynamics 365 Finance REST web services in isolation.