Outlook 2010 Creating Appointments with Pacific Time even though the PC and the Timezone on the Appointment Show Eastern Standard

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.

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David Johnson, CD, MVPOwnerCommented:
from the exchange server which is in PDT and is not something to worry about..

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bas2754Author Commented:
Sorry for the late reply.  I thought the same thing except if the user makes the appointment for 9:00 PM EST, but sometimes folks that receive the appointment in EST timezone find it showing as 6:00 EST (which is really 6:00 PST if you apply the offset).

Not sure what is going on here.

Thank You,
David Johnson, CD, MVPOwnerCommented:
you really have to open the attachment and look at the contents of the .ica file.. somewhere someone is using the wrong timezone as everything is referencing UTC
bas2754Author Commented:
I am waiting for some further feedback from the client, but it appears that your answer is correct David.  Once I have confirmation I will close this out with your answer as the solution.
bas2754Author Commented:
In this case, the user was not looking at the time when it was added to their calendar, they were just looking at the timezone in which the "appointment" was made.  After many, many calls and tests we were able to finally convince the client this was not a problem.
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