Ran into a fun issue today… I had a pair of Server 2012 R2 servers in a remote office that refused to sync the proper time for their clocks. No matter what I did they were always off by five minutes. One of them was a domain controller for the office.
In the process of fixing the issue I learned about an interesting feature in hyper-v that was the root cause of all my trouble. By sharing my experience, hopefully you will avoid the same issues I ran into.