I receive an error from Outlook 2007 that was fine yesterday. "Outlook is using an old copy of your offline folder file (.ost). Exit Outlook, delete the .ost file, and restart Outlook. A new file will be automatically created the next time you initiate a send/receive."
Unfourtunately there is no .ost file to be found anywhere on the HDD. I have tried to add the file from a fresh install (different computer, just because we will try anything sometimes) and it made no difference.