Do you have your Calendar folder auto-archiving so that items are moved to
an archive PST or pruned from the file completely?

"Kamco Property" Kamco wrote in message
...
I have Windows Vista and Outlook 2007. All of the sudden, calendar items
from previous days disappear. They still appear for the future and they
are
still on my iPhone, though. I need to retain the past items on my
calendar
to remember/review meeting dates, etc. Any help?