troubleshooting Question

Disable Automatic Daylight Savings across entire domain (GPO)

Avatar of luke_brannon
luke_brannonFlag for United States of America asked on
Windows OSActive DirectoryMicrosoft Server OS
12 Comments2 Solutions11232 ViewsLast Modified:
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.

Has anyone implemented this in their domain? Any suggestions on what I can try next?

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