Comment 2 for bug 493866

Not a the level that the .pts files are locked. If you try you will get an error saying part of the file has been locked by a different process, error code "0x80070021".

https://help.ubuntu.com/9.10/windows/C/preparing-email.html
Section: Exporting all Outlook data
Add "Close Outlook. " to the start of step 5.