Before you install vCenter Server or deploy the vCenter Server Appliance, make sure all machines on your vSphere network have their clocks synchronized.


  1. In the vSphere Web Client, navigate to the vCenter Server instance.
  2. Select the host in the vSphere inventory.
  3. Click the Manage tab, and click Settings.
  4. In the System section, select Time Configuration.
  5. Click Edit and set up the NTP server.
    1. Select Use Network Time Protocol (Enable NTP client).
    2. Set the NTP Service Startup Policy.
    3. Enter the IP addresses of the NTP servers to synchronize with.
    4. Click Start or Restart in the NTP Service Status section.
  6. Click OK.
    The host synchronizes with the NTP server.