Microsoft Dynamics 365 for Finance and Operations is covered by Microsoft's Modern Lifecycle Policy, which covers products and services that are serviced and supported continuously.

Microsoft will continually update the Platform and Financial Reporting components with the option to postpone up to two consecutive service updates.

With continuous, touchless service updates in D365FO, it maintains backward compatibility, which means there is no need to merge your code. However, the need to test all extensions, as well as out-of-the-box existing and new functionality, is critical in order to continuously evolve your cloud ERP.

After an update is completed in a particular environment, you need to run all business processes to test and validate the update. Hence, the need for continuous testing, and to support this effort, a no-code automation test tool for business process testing is available – RSAT. 

RSAT allows us to record business tasks using the D365FO task recorder and convert them into a suite of automated tests. All this can be done without writing any code. RSAT is available for use from PU15, and beyond.