My IT department kindly upgraded my office PC when I was on vacation. The original operating system was Win98 Second Edition. The PC was upgraded to XP Professional. I have lost previous inbound/outbound email and (2) address books within Microsoft Outlook. We are "Not Utilizing" an Exchange Server. I have looked through several areas of my drive and cannot locate the information for retrieval. Do these files automatically get deleted with a system upgrade? I was not able to export the email folders and address book prior to leaving on vacation. The upgrade was unfortunately completed without my knowledge. The information was extremely important.