MS Outlook 2003

I had a complaint from one of our remote users this morning that all
occurrence appointments in the calander shift one hour ahead. I was able to
verify this by remote controll. I checked the system date and time and they
are configured correctly.

If I viewed one of the appointments it show the correct time. I checked for
conflicting appointments could not find any.

I am not sure what is causing this to happen. Any suggestions.

Thanks