Bret, This DST patch specific to Exchange will only matter if you are using OWA in your environment. If you are using all Outlook clients on desktops, make sure you rollout the DST patch for the OS on those clients, as well as the server. Outlook clients use the OS time zone for calendar and other items, whereas OWA does it differently using CDO. If you don't have the Exchange 2000 DST patch OWA will show incorrect times during the 3-4 week period, i.e OWA will assume the old DST standards. Regards, HTH. Regards, Raj Periyasamy MCSE(Messaging), CCNA ________________________________ From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Bret Hanson Sent: Thursday, February 01, 2007 4:32 PM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Exchange 2000 and DST I am being asked by the powers that be at my company what the worst possible scenario is if we keep our Exchange 2000 server running past March 11, 2007 without spending the 4 grand for the hot fix. While an Exchange 2003 or 2007 upgrade is in our near future, we doubt it will happen before this date. At this point, it looks to me like the time stamps on email, calendar entries, etc will be off by an hour for approx 3-4 weeks until the first Sunday in April (old DST date) rolls around. After that point is it safe to assume email and other Exchange objects would have the correct time stamp? My main fear, is the fear of not knowing what to expect. Can someone shed some light or speculate what could happen? Thanks Bret Hanson Systems Administrator Yunker Industries, Inc.