In our project we have approximate 40 enum attribute .Can we import enum attribute values? or Is like that mendix allow to int and string attribute only? How to map string and enumeration (in domain model we have enumeration and other end where we are importing we have string ).
You can indeed add enumerations to your import mappings. The sender still sends them as strings, but they are then mapped to an enumeration. Imply add the enumeration to the object in your import mapping (on the receiving side).