Microsoft has released the final production version of the update for DST 2007 for Exchange Server 2003 Service Pack 2 (SP2). This update includes changes for the United States DST change for the components affected in Microsoft Exchange. It also includes changes for the time zones in Canada (except Newfoundland) which will make the same change to their DST transition dates from 2007.
The fix is available here:
In addition, the corresponding KB article is here:
For customers who have signed up for Microsoft Update, this update will be offered as an Optional Update for now. The current plan is to make it a critical update in sync with the Windows version i.e. KB 928388. For more information on planning for the Daylight Saving Time changes in 2007, please see our web page here:
Please let me know if you have any questions.