I have exported my "Building" Object Type and my "Location" Object Type from Server based Insight to the files "Building.csv" and "Location.csv" respectively.
I created those Object Types in our Cloud instance of Insight and then imported "Building.csv" and everything was fine.
When I then imported "Location.csv" all the attributes were fine except for the attribute referencing Building objects. That attribute showed "no value" on all my Location objects.
How do I preserve the links for attributes referencing objects when I import?