If you have two things trying to correct the clock, they will fight each other. Note that if you are in an Active Directory environment, and everything is syncing from the PDCe as it should, then VMs should not be configured to sync their time with the physical host. Click the system clock, in the bottom right hand corner of the screen.
Microsoft Windows Operating Systems (7, 10) 1. Provided you have access to the Internet or a local time server, you need never worry about system time drift. The PDCe should be the only server that syncs with an external source. Most operating systems have built-in tools to keep the time on your computer accurate. The PDCe should be configured to sync with an external time source via NTP. In an Active Directory environment, the PDCe is the 'root' time server that every other domain controller syncs against (and every member server and workstation syncs against the domain controllers). I am confused by your comment that this one server is off, but all the other ones are accurate, but you are using. See here: Active Directory Time Synchronisation - Time-Service Event ID 50 First off is not a reccomended source for the Windows Time Service.
