Disable Automatic Daylight Savings across entire domain (GPO)
We run a server application that has undesirable results when using the option in Windows that automatically adjusts time based on daylight savings rules. The only problem is that the server must do a time sync with the domain because of the critical role time plays in domain operations, so I can't just disable daylight savings on this one server because when it syncs it will always be incorrect by one hour.
This server application is important enough that I would like to disable daylight savings in the entire domain. So far, I've tried to push out a GPO that modifies the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation\DisableAutoDaylightTimeSet (set value to 1)
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation\DynamicDaylightTimeDisabled (set value to 1)
I've verified that the GPO is being applied through gpresult, and I checked to make sure that the registry entries are being successfully modified, and they ARE. I've tried applying these registry keys one at a time, and together. This is not effectively disabling the option, though.
All of my servers are Windows Server 2008 R2, and my client test machine is Windows 7 Ultimate x86.
I would really like to disable daylight savings, and remove the option from Windows. I will definitely settle on just disabling DST, though.
I've attached a screenshot of the GPO on the server and a screenshot of my test client PC's registry.