Outlook 2010 complained of errors in an OST file, so I made a backup copy of the 9GB file, and used scanpst.exe to try and remedy the issue.
scanpst.exe ran for about an hour and a half and then completed. When I opened Outlook again, first it asked me to select the profile to use, and then I received the following error message:
"Outlook is using an old copy of your Outlook data file (.ost). Exit Outlook, delete the file, and restart Outlook. A new file will be automatically created the next time you initiate a send/receive."
Then Outlook opened. When I clicked Send/Receive, Outlook complained that the permissions on the OST file outlook was using were incorrect.
Re-downloading the OST file will take a pretty long time considering it is 9GB. In the meantime I have sent the user to the webmail on the exchange server, but I am wondering what I should do...should I just delete the OST file and let Outlook recreate it or is there something else I can do to fix this that would require less time?