I've patched all our machines for the DST change, I've applied the Exchange update and run the tzmove for all calendars in mailboxes and the shared calendar inour public folders. Mailbox calendars display correctly from Outlook and OWA, public folder calendars display correctly from OWA, but Outlook is incorrect. The only way to display it correctly in Outlook is to change the timezone under advanced calendar options to Mexican Mountain Time Zone (Chihuahua, La Paz, Mazatlan). Does Outlook use it's own set of time zones? When you go to the list, you'll see the old and new Mexican Mountain Time, but only one MST. This is a great problem to find in the week before the change. We have some clients who rely on this pretty heavily. Any help would be greatly appreciated! Thanks in advance!

How did you update your public calendars with TZMOVE? It appears to only update my personal calendars, but not our public ones. thanks for the help. Tim

Hey Matt, if you didn't get your answer you may find this helpful. It's for SBS but should helpexplain what's going on. http://blogs.technet.com/sbs/archive/2007/02/13/extended-daylight-saving-time-sbs-2003-and-you.aspx It also has your answer for why OWA and Outlook read times differently. ***************** AndKdog.. http://msexchangeteam.com/videos/9/tools/entry435540.aspxhas a pretty decent video/walkthrough of how to update public calendars Just make sure you haveproper rights.