I am sure this reply is kind of late for you, since your request for
information was posted in May. However for future occurences. If you delete
an item in your calendar (local personal calendar) it goes to your deleted
items folder. You can easily just replace it back into your calendar if you
do not automatically delete your deleted items upon leaving Outlook.
If you do delete the items in your deleted items box regularly and this item
was deleted, then it is impossible to replace the deleted item without
rebuilding it.
Hope it helps,
Jon