Business Rules introduced in dynamics quite a few years back with CRM 2013 , We have been using these dynamics features since then..
This will mainly help to diagnose any business rules issue encountering in dynamics 365 or data verse application.
To Install this toll, open XrmToolBox Tool Library and selected “BusinessRulesScriptViewer” and then press Install
Once installed, open this tool and connect to the relevant data version environment.
Following are brief steps on how to use this tool.
Step 1: Select Solution from the solution dropdown
Step 2: After Solution is selected, the system will show you all entities which are in the currently selected solution so pick the relevant entity (or table) where the auto number column resides.
Step 3: Once Entity is selected, it will populate all available Business Rules for selected Entity in left tree view Control.
Step 4: Select relevant Business Rule, system will show script related to selected Business rules
I hope this helps…