We have a user that when he creates appointments in his Outlook 2010 on his computer will sometimes show the timezone of the Organizer as being Pacific instead of Eastern. I myself have watched this happen. He will make an appointment for 6:00 PM EST. His PC is set to EST. Clicking the Timezone option on the appointment shows it as EST. When I receive the appointment is shows it for the correct time of 6:00 PM EST, however the email notification says "The organizer created this meeting in the following time zone (UTC-08:00) Pacific Time (US & Canada).
The service is hosted through an Exchange hosting provider (Intermedia) which is indeed in the Pacific Time Zone, however my understanding and their support said the same thing is that the time zone is a client preference and just an offset of UTC time. This means that the server time zone does not change / affect the appointment time zone.
I have exhausted my resources short of calling Microsoft directly. As stated before the local PC is set to EST. The Timezone in Outlook shows as EST. Webmail shows as EST. Where in the world is it picking up the Pacific time zone from.