D365FO come with a generic mobile application that can be utilized for requirements where you need to serve a mobile workforce. The Finance and Operations mobile app can work even in offline mode and automatically synchronize when connected to the internet. The best part is that, as an IT admin, you can build and publish mobile workspaces as per the organization's needs. The app leverages your existing code, business logic, and security configuration. You can easily design mobile workspaces using the point-and-click workspace designer that comes built in with the web client of D365FO. You can further optimize the offline capabilities of workspaces by utilizing the extensibility framework for business logic. Using this, you can provide additional business logic and rendering support by adding a JavaScript file with the application workspace metadata.

Microsoft has already shipped and is continuously shipping several common-use, out-of-the-box mobile workspaces; however, you can further extend or create new mobile workspaces as per your specific requirements.