title: Adobe Marketing Cloud Visitor ID on Cross domain tracking?
body: <p>Will AMC Visitor ID service really helps to track cross domain tracking? or should i need to go with FPC in order to do cross domain tracking. My scenario is below...</p>
  
  <pre><code>Want to track Domain A --&gt; Domain B(FPC already available: metrics.domainA.com)
  New requirement: Domain C  --&gt; Domain D(Not sure if we need seperate FPC(ie: metrics.domainc.com)
  </code></pre>
  
  <p>Also, in future i can expect this requirement Domain A --> Domain C --> Domain D</p>
  
  <p>not sure, if i use Visitor ID will there be any chances of browser rejecting third party cookies. Because, Adobe is still recommending to go with CNAME(FPC) if we are collecting data from multiple domains.</p>
  
  <p><a href="https://marketing.adobe.com/resources/help/en_US/mcvid/visid_mig_overview.html" rel="nofollow">https://marketing.adobe.com/resources/help/en_US/mcvid/visid_mig_overview.html</a>
  <a href="https://marketing.adobe.com/resources/help/en_US/mcvid/mcvid_cname.html" rel="nofollow">https://marketing.adobe.com/resources/help/en_US/mcvid/mcvid_cname.html</a></p>
  
  <p>Any suggestion??</p>
  
  <p>Thanks</p>