我遵循本文中给出的build议： http : //technet.microsoft.com/en-us/library/virtual_active_directory_domain_controller_virtualization_hyperv（WS.10）.aspx#deployment_considerations_for_virtualized_domain_controllers
但是，我的域名正在慢慢地失去时间，比时间服务器显示的时间晚了大约7分钟。
我有两个HyperV主机，每个都有一个DC。 主机也是域成员。
第一个HyperV主机是HyperV Server 2012 R2，DC是SBS 2011.第二个HyperV主机是Windows Server 2008 R2，DC是Server 2012（不是R2）。
如何保持域名时间正确？
编辑：
输出w32tm / query / status / verbose
PS C:\Windows\system32> w32tm /query /status /verbose Leap Indicator: 0(no warning) Stratum: 2 (secondary reference - syncd by (S)NTP) Precision: -6 (15.625ms per tick) Root Delay: 0.0621217s Root Dispersion: 0.0288198s ReferenceId: 0xA6468829 (source IP: 166.70.136.41) Last Successful Sync Time: 12/16/2014 2:18:12 PM Source: 2.us.pool.ntp.org Poll Interval: 10 (1024s) Phase Offset: -0.0000639s ClockRate: 0.0156250s State Machine: 2 (Sync) Time Source Flags: 0 (None) Server Role: 576 (Reliable Time Service) Last Sync Error: 0 (The command completed successfully.) Time since Last Good Sync Time: 637.4983578s