Hi Pravin,
Do you have enumeration field in your entity because drop down search field only works for enumeration values -> check if available then check the security access or please attach more screenshots
Hi
Check the access for the entity(drop down)
Easy to let Mendix Studio solve it. Do to the domain model, right-click the entity (Administration.Account probably), select generate overview pages. Then go to that page, open it, right-click the Datagrid and click on Convert to DataGrid2. That will get you the dropdowns.