Recurring appointments are 1 hour off

I recently moved my cell service from T-Mobile to Verizon. I upgraded my phone from a Galaxy S4 to a Galaxy S5. Upon connecting the device via Active Sync to our Exchange 2010 Server (SP3 RU7), several recurring appointments that are on my calendar are displaying 1 hour earlier than the actual appointment. (10:15 recurring appointment is 9:15 on the phone). I have confirmed the correct time zone and tested adding new appointments and recurring appointments and all display correctly. It seems this is only affecting previously added appointments. The items show correctly in the Outlook calendar. I also have a second calendar in my mailbox which is used to show the schedule of our server backups and all of the items on it show an hour off on the phone. I reset the device to factory and attempted to configure it again with the same results.

Any ideas what in the world is happening? Thank you in advance.
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Snagajob ITAsked:
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JohnConnect With a Mentor Business Consultant (Owner)Commented:
You said the new appointments on the new phone are correct.  

There must have been some issue with the old phone / old supplier.

Something WAS wrong. So if it is all OK now, all you can do is fix the old problem appointments.
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JohnBusiness Consultant (Owner)Commented:
It seems this is only affecting previously added appointments.  <-- It would seem the old phone on the old service may have been on the wrong time zone.

Since the new phone on the new service is properly set and working correctly, I don't think you can do much with the old appointments except to change the times manually for the problem appointments.
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Snagajob ITAuthor Commented:
The old phone showed all the items correctly, it is the new phone which is displaying the items 1 hour off. If I start modifying all of the appointments then they will show incorrectly in Outlook where they are correct.
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JohnBusiness Consultant (Owner)Commented:
One of the phones is on the wrong time zone or has the wrong date/time as this is what causes the issue.
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Snagajob ITAuthor Commented:
The old phone never posed an issue. I have verified the new phone is showing the correct time zone. It seems that if the time zone were incorrect on the new device all appointments would be incorrect.
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Snagajob ITAuthor Commented:
Sorry to keep going back and forth but there wasn't anything wrong with the old phone if all appointments showed correctly regardless if it were a recurring appointment or not. Adding new appointments to the new device or Outlook show correctly it is only with the old recurring appointments some of which I scheduled with the old phone and did not have the issue.
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JohnBusiness Consultant (Owner)Commented:
OK, so everything was correct and everything is correct, nothing whatever was wrong.

But the appointments are wrong. Magic.  All you can do is fix them.
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Snagajob ITAuthor Commented:
Maybe I am not describing this correctly. All appointments on the old phone were correct. Once I moved over to the new phone only previously scheduled recurring appointments are showing incorrectly only on the new phone. I will test adjusting one and see if it syncs correctly I was more looking towards a potential reason behind the change when switching phones/carriers.
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JohnBusiness Consultant (Owner)Commented:
I have switched phones with no time issues at all. I cannot tell from here what changed and it is really hard because you are insisting everything is correct. So there is nothing more I can do.
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Snagajob ITAuthor Commented:
I am sorry we are not communicating correctly. I only stated everything was correct on the old phone. Once I moved carriers and changed devices the new devices is incorrect. Outlook is still accurate. If I make a change on the phone or in Outlook for previously existing recurring appointments the NEW phone is still showing off by 1 hour. Thanks for your suggestions but it seems to be an issue on the new carrier and phone.
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JohnBusiness Consultant (Owner)Commented:
Computers and phones have 3 settings. Time Zone, Date and Time and Daylight Savings Time (which is a subset of Time).

If you are very certain of all 3 settings in the old phone, then something (such as DST) must be different in the new phone / carrier.

I do not know what else.
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Snagajob ITAuthor Commented:
Manually changing the appts was the only corrective action.
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JohnBusiness Consultant (Owner)Commented:
@PM_IT  - Thanks for the update. Manual change is probably the only solution here and at least it is working for you.
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Snagajob ITAuthor Commented:
Update that the first phone went bad so another device (same model) was received and upon initial setup the same issue occurred on the new phone where all recurring appointments were 1 hour off. This happened after manually updating them on the original phone so this has to be on the carrier.
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