In VSphere 5.0 ESXi we can not set time synchronization with a NTP server because the ESXi host is on a private network with no Internet access, so we have to rely on the internal server clock.
I noticed that if I set the right time in the CMOS clock, VSphere client sets time 1 hour forward. On the other hand If I adjust time setting in VSphere, at reboot CMOS clock is automatically set 1 hour back. Perhaps this behaviour depends on the fact that our zone is GMT +1, but I can not understand where VSphere takes this information, and mostly if I have to set time from BIOS, or directly in VSphere client.
Thank you all.
Victor