title: VMs unable to join domain controller on Hyper-V host
body: <p>I've setup a Hyper-V machine running Server 2008 R2.  it's configured as a DC for contoso.com (for example).</p>
  
  <p>I'm trying to get a virtual machine to join the Domain, but it says it cannot find a domain controller for that domain.  The virtual can ping the host (servername.contoso.com) ok.</p>
  
  <p>Any thoughs?</p>
  
  <p>thanks.</p>