I have a Windows 2008 R2 DataCenter host Server which hosts 8 virtual machines. I have found that when I try to ping or remote desktop onto two of them, I either get request timed out or unable to connect to remote desktop. This is strange in that it randomly happens and a reboot will fix the issue. The two machines in question are both Domain Controllers and so far I don't see the others displaying the same problem. I didn't setup the Teaming (and i'm not entirely sure how it works) but I'm wondering if this is causing the issue?