If the Mapping tab importer wizard returned no errors, but your changes didn't import, check the Logs tab in the lower left hand corner of the connector config. The most common cause is: Provision Failed - RefIds are shared with conflicting attributes or between different entities.
This error indicates that your import file used the same RefId across different entities, or assigned a single entity more than one value for an attribute that only expects one.
Read more: What does the error "Provision Failed - RefIds are shared..." mean?
Contact Mapped Support if you're seeing a different error, or no errors, in the connector logs.