Hi All, We have a 3cx version 12, in which all the phone(SPA504G) show 1 less that the time in 3CX. In 3cx I have "pool.ntp.org" in time server and time zone for SPA is set. In SPA again NTP enable is "yes" and the primary NTP is "pool.ntp.org" and SPCP Auto detect is NO. But still has exact 1 minute difference with 3cx server. In 3cx server to set time I have followed this link "http://www.3cx.com/blog/docs/setting-windows-server-time/" but still has the same issue. Any help would be appreciated.