Before you install vCenter Single Sign-On, the vSphere Web Client, or the vCenter Server appliance, make sure all machines on the vSphere network have their clocks synchronized.
Procedure
- From the vSphere Web Client, connect to the vCenter Server.
- Select the host in the inventory.
- Select the Manage tab.
- Select Settings.
- In the System section, select Time Configuration.
- Click Edit and set up the NTP server.
- Select Use Network Time Protocol (Enable NTP client).
- Set the NTP Service Startup Policy.
- Enter the IP addresses of the NTP servers to synchronize with.
- Click Start or Restart in the NTP Service Status section.
- Click OK.
The host synchronizes with the NTP server.