Build extended data types and enumerations for Dynamics 365 for Finance and Operations

Dynamics 365
Finance and Operations


Dynamics 365 for Finance and Operations is now being licensed as Dynamics 365 Finance and Dynamics 365 Supply Chain Management. For more information about these licensing changes, seeĀ Dynamics 365 Licensing Update.

Extended data types (EDTs) and base enumerations (enums) are data types that are created and managed in the development environment. Base enums represent a list of literals, while EDTs are reusable data types that have a specific definition. The Application Object Tree (AOT) in Dynamics 365 for Finance and Operations contains many existing EDTs and base enums that can be extended for use in your project, or you can create new data types. This module will focus on creating new data types.

In this module, you will:

  • Identify the different types of EDTs.
  • Learn about the use of base enumerations (base enums).
  • Identify how EDTs and base enums are viewed in the Dynamics 365 for Finance and Operations user interface.
  • Create a base enumeration.


  • Basic understanding of enterprise resource planning systems
  • Basic knowledge of development terms and verbiage