Implementing Microsoft Dynamics 365 for Finance and Operations

Overlayering

Customization using overlayering is similar to customization concept used in the earlier version of Dynamics AX. In Microsoft Dynamics 365 for Finance and Operations, Enterprise edition you can only override an element in the same package where it is originally created. You also have to use higher layer than the original layer of the element. For example, if you want to override an element created by Microsoft in ApplicationSuite package which is in SYS layer, you have to create a model in ApplicationSuite package and select higher layer such as CUS or USR to override the elements.  

When you customize using overlayering original code element is copied over in model you are working on and you are technical changing that copy ...