The following is a step by step guide on configuring Network Time Protocol (NTP) for a VMware ESXi 6.0 host.

1. Using the VMware vSphere Client enter the authentication credentials for the root account and click Login.
2. On the graphical user interface (GUI) of the VMware vSphere Client select Configuration.
3. Under the Software Menu select Time Configuration then click Properties.
4. In the Time Configuration dialog box click to check box for the NTP Client Enabled option. Then click Options….
5. In the NTP Daemon (ntpd) Options dialog box select NTP Settings and click Add….
6. In the Add NTP Server dialog box add the hostname or Internet Protocol (IP) address of an NTP server. Then, click OK.
7. In the NTP Daemon (ntpd) Options dialog box select the check box to Restart NTP service to apply changes. Then click OK.
8. In the Time Configuration dialog box click OK.
9. On the GUI of the VMware vSphere Client verify the NTP Client is Running.