We have two domain controllers with windows server 2012 R2. My Timezone is set to +3:30 and I disabled the daylight savings. Daylight savings will add 1 hour to current time but I want it to be unchecked and add 1 hour manually to current time. After server reboot or a while my time goes back 1 hour!! NTP is disabled, Windows Time service is disabled. Why I can't set my clock manually? I unplugged PDC from network and added 1 hour and reboot. the result was Ok. This shows that when PDC boots, it syncs clock with somewhere. How can I disable this? Please help, My entire domain clock is in wrong time. Thanks
you need to disable the external time source to stop updating system time. you have two ways to fix this,
w32tm.exe /config /manualpeerlist:"127.0.0.1" /syncfromflags:manual /reliable:YES /update
or go to regedit
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\W32Time\Parameters]
"NtpServer"="127.0.0.1"
this way you guarantee that your system have no external time source.