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.

1

Start the vSphere Client, and connect to the ESXi host.

2

On the Configuration tab, click Time Configuration.

3

Click Properties, and click Options.

4

Select NTP Settings.

5

Click Add.

6

In the Add NTP Server dialog box, enter the IP address or fully qualified domain name of the NTP server to synchronize with.

7

Click OK.

The host time synchronizes with the NTP server.