Problem:

When I want to set up a Data Flow, in step “Object or Entity - Select data structure”, in the Select an Object or Entity selectlist, the Object or Entity I want to import data in is not available.

Answer:

The Select an Object or Entity dropdown list only shows Objects and Entities that are both searchable (Salesforce: Allow Search enabled) / readable (Dynamics), and creatable. Please check the settings of your Object or Entity.