How to configure NTP in Windows Server 2008
Even though there is a possibility to use VMware Tools to synchronize local Windows Server clock with ESX host, it is best practice to use an external reliable NTP source. To configure NTP source in Windows Server, open Command Prompt and type the following:
w32tm /config /manualpeerlist:"europe.pool.ntp.org,0x1" /syncfromflags:manual /update w32tm /config /update net stop w32time && net start w32time
Now check the local clock and make sure that it is in sync with your NTP source