Every organization has custom data that is specific to their operations/process.
Most organizations see tremendous value in bringing over that data to work with your enterprise software system either interactively for transactions or use for reports/dashboards.
Microsoft Dynamics 365 Finance and Operations has provided a Data Management Framework (DMF), that allows for the D365 system to be that one fully-integrated & all-encompassing system.
We will walk through Data Management Framework of Dynamics 365 Finance & Operations.
Source: https://ascent365.com/blog/importing-custom-data-in-d365-data-entities/
0