For use with Adobe DTM --a snippet to map the Adobe Marketing Cloud Visitor ID to itself with an alias name for Customer Attributes.

Map_Adobe_MCVID_DTM.js

(function(){
  function map_mcvid(retry) {
    var sat = window._satellite;
    if('undefined' !== typeof sat && sat.getVisitorId()) {
      var mcvid = sat.getVisitorId().getMarketingCloudVisitorID();
      if (mcvid) {
        sat.getVisitorId().setCustomerIDs({ "demandbase": mcvid });
      } else if (retry) {
        window.setTimeout(function() { map_mcvid(false) }, 1000);
      }
    }
  }
  map_mcvid(true);
})();