Yes I need this. Would be good for importing too. At the moment you can either ‘overite’ or not during an import, but for multi-select properties we don’t want either of those options, we want to add/append the imported value to that property e.g. if they currently have value A1 and we import B1, we want the property to show both A1, B1 not one or the other. Can’t see a way to do this at present. I’ve just been unticking the overite and then viewing the list in the contact view after import and manually adding the imported value to any contact who is missing the value. We are only working with small numbers of contacts but will be mega annoying once we are handling large chunks of data.