Actually, we are doing something similar here. We have Exchange 5.5 and a NT4 backbone, our conversion to a 2003 AD isn't happening until the end of the summer. After researching the ridiculous costs associated with buying a patch from Microsoft and all the issues resulting from the fix, we decided to test a similar theory in our lab. The results seem to very favorable. All we are doing is making sure all servers and pc's get the new time from our time server and NOT making ANY offset changes to any pc or server. After April 1, we will adjust the time BACK one hour and let all the pc's and servers synch up again. Greg -----Original Message----- From: Bruce J. Rose [mailto:brose@xxxxxxxxxxx] Sent: Thursday, March 08, 2007 8:23 AM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] DST Patch Instead of patching DST patch could one not turn off DST in windows and move time up 1 hour? Bruce CONFIDENTIALITY NOTICE: This e-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential information and privileged information. Any unauthorized retention, review, printing, copying, disclosure or distribution is prohibited. If you are not one of the intended recipients, please contact the sender by reply email or phone, destroy all copies of the original message and keep the information contained here confidential.