This is turning into a REALLY REALLY BIG issue.
To be clear the new DST change periods are: March 11, 2007 to April 1, 2007 and from October 28, 2007 to November 4, 2007.
March 11, 2007(three weeks earlier)
April 1, 2007
October 28, 2007
November 4, 2007(one week later)
So Microsoft Articles to date are:
Blackberry Articles: US Daylight Saving Time Changes and Blackberry
IBM Articles: Lotus software- Daylight Saving Time (DST) changes for 2007 will affect Lotus software products
Also remember that any other Application that uses CDO will need to be updated. Check with your Application vendor first.
Outlook is looking like it's going to be a pain in the butt. The problem is that when you apply the Windows Operating System Update for DST 2007 you will have Outlook calendar appointments off by 1 hour during the DST Change periods.
The solution requires three things to be in place for Outlook calendar items to be updated properly.
If all of these patches and tools are not used together, then there will be calendar inconsistencies. If you install update 928388 or 914387 for the operating system without doing anything else, users are notice that the meetings during the DST change periods are ahead by 1 hour. This is expected behavior without installing the Exchange server hotfix 926666 patch and using the Outlook or Exchange tool to rebase the appointments that are in the DST change period.
The Outlook tool is due to be released in January 2007 through the Microsoft Download Center that can update calendar items in Outlook to accommodate the changes in DST during the Extended DST period. This program is called the Time Zone Data Update Tool for Microsoft® Office Outlook® (Time Zone Data Update Tool).Microsoft Office Outlook 2007, the newest version of Outlook, has the ability to automatically detect the DST change and prompt the process that updates a person’s calendar to conform to the new daylight saving time rules. However, the Time Zone Data Update Tool contains enhancements that improve upon what is available in Outlook 2007and should be run instead of the out-of-the-box Outlook 2007 experience.
The Time Zone Data Update Tool is necessary to update calendar items that occur during the Extended DST periods for the following earlier versions of Microsoft Outlook:
The following table describes the situations when you should download and run the Time Zone Data Update Tool:
Check out the scenarios at the bottom of 931667 and MAKE SURE YOU READ THIS: http://office.microsoft.com/en-us/outlook/HA102086071033.aspx
In the mean I will keep an eye on the Exchange Download Centre (http://www.microsoft.com/downloads/results.aspx?freetext=&productID=899CABAF-A55E-402B-AA90-5114BD4C014E&categoryId=&period=120&sortCriteria=date&nr=50&DisplayLang=en)
This is turning into a REALLY REALLY BIG issue. I blogged this earlier: http://blogs.flaphead.dns2go.com/archive/2007/01/23/more-dst-2007.asp
Thanks for the excellent info!
What is the best approach for installing DST 2007 Patch for Exchange on a cluster? Is it safe to do the offline node first, fail over then do the other one? Or is it best to bring Exchange down completely and do them both at the same time?
I second ziffle85's comment. I have been looking for documentation concerning Exchange clusters, but MS site is lacking...anyone?
Not only microsoft is affected....here's a list of other products, including sun and linux that are impacted: http://www.technologyrage.com/site/2007/01/vendor_links_1.html
I also blogged about this a month ago, and delivered the bad news to blackberry and others before that...Where were the software vendors in 2005?
Try this link.... it gives you a general idea how to patch cluster servers
http://support.microsoft.com/kb/328839/en-us
Thanks for pointing this out. IT professionals worldwide need to be cognizant of the DST2007 problem, especially if your organization, your organizations customers, or your partners have a physical or electronic presence in the United States or Canada. There is a small but growing body of information available online to help address the DST2007 problem. For example, there is a tool available at sharpebusinesssolutions.com/dst2007.htm to help with one of the toughest parts of the problem - unsupported versions of Microsoft Windows.