From what I understand, Yes. Any appointments scheduled for during the 3 weeks difference while the client or server were not patched will be off by an hour. I know of several system admins that are simply saying screw it and telling their users to deal with it. We have tons of hours into the DST issue and haven't even began to rebase calendars, thank you Uncle Sam. George Taylor Systems Programmer Regional Health Inc. _____ From: Ara Avvali [mailto:ara.avvali@xxxxxxxxxxxxx] Sent: Thursday, February 08, 2007 11:38 AM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Re: How to address daylight saving time by using the Exchange Calendar Update Tool Is it necessary doing this if both server and clients are fully patched with wsus? From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Michael B. Smith Sent: Thursday, February 08, 2007 5:36 AM To: exchange-2003@xxxxxxxxxxxxxxx; exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] How to address daylight saving time by using the Exchange Calendar Update Tool It's live: How to address daylight saving time by using the Exchange Calendar Update Tool http://support.microsoft.com/default.aspx?scid=kb;en-us;930879 And the tool: Exchange Calendar Update Tool http://www.microsoft.com/downloads/details.aspx?FamilyId=A9336886-4B28-4 010-9416-36D38429438D&displaylang=en ***Note: The information contained in this message, including any attachments, may be privileged, confidential, and protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the Sender immediately by a "reply to sender only" message and destroy all electronic or paper copies of the communication, including any attachments.