I am looking to update assets that are already in my Lansweeper program, if i use the Import Asset template will it only populate the fields that I updated or will it over ride all the information for that asset? 
To clarify I only want to update one field of my assets for example:
AssetName  Mac    Memory   Etc   Etc    Custom 1
123Comp    blank  blank    blank blank  315-237-2844
The blank fields already have data, what will happen?