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Calendar appointments are still an hour out after applying DST updates

Posted on 2008-10-29
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Last Modified: 2012-05-05
We have a Cirix Thin Client network, all running of window server 2003 and one exchange 2003 server.
I have been having lots of calls about the appointments in outlook calendars being one hour out when they where added within the last month. The exchange DST update was applied and all new appointments entered appear at the correct time now, but most of the older apointments that were entered before the update have still got the wrong times.
I have also tried using the outlook TZD update tool to see if I could at least rectify one outlook calender, but to no avail.
Is there anything I can do to make the appointments change to the correct time ?
I've read so many Microsoft help and support pages on these updates tools, to the point that I am more confused than when I started.
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Question by:afletch78
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7 Comments
 
LVL 14

Expert Comment

by:Ehab Salem
ID: 22830466
SOmetimes DST does not apply till you open time control panel, remove DST, click ok, then tick it, and click ok.
Sometimes (very rare) you would need to restart the machine.
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LVL 26

Expert Comment

by:jar3817
ID: 22830605
From what I remember, all machines involved had to have a DST patch to prevent problems with new calendar items: exchange OS, exchange program, client OS, and in your case probably the terminal server.

I didn't have many calendars to fix, so I used the individual fix util called "tzmove.exe". You run it from the client (or a machine with the user's exchange profile setup in outlook) and it fixes all the timezone problems.

http://www.microsoft.com/downloads/details.aspx?familyid=%20E343A233-B9C8-4652-9DD8-AE0F1AF62568&displaylang=en
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Author Comment

by:afletch78
ID: 22833423
I've tried both suggestions, and neither worked.

jar3817 - when I ran the 'tzmove.exe' it just came back with : "No appointments, meetings or reminders were found that need to be moved to a new time zone"  - but there are ! and I can still see the appointments that are a hour out. I've tried it using random user accounts and it still come back with the same message.
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LVL 26

Assisted Solution

by:jar3817
jar3817 earned 100 total points
ID: 22833662
Are you running this tool from a dst patched workstation?
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Author Comment

by:afletch78
ID: 22839218
I have installed the KB 951072 patch on the workstation. Is that the patch that you are on about ?  
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Accepted Solution

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afletch78 earned 0 total points
ID: 22839273
think I've found the problem, I found this in one of the many long winded microsoft documents about the exchange / outlook dst tools ,  I think this part should have been with the documentation with the dst update.

Rapid succession of steps is important: As mentioned earlier, it is better to run the Outlook or Exchange Time Zone Data Update tool as soon as possible after the time that the Windows operating system time zone updates are applied to all computers. If calendar items in the extended DST period are scheduled after the operating system updates are applied but before the tool is run, they will incorrectly be moved one hour earlier. To correct such calendar items, organizers should manually update such items to help make sure that they are scheduled accurately for themselves and all invitees.


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Author Comment

by:afletch78
ID: 22842818
answer found
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