Convert Outlook .ost file to .pst [duplicate]

"If you have a backup of the machine, you can fire up outlook with the 445MB OST in place and remove the network cable. Outlook will start in ""disconnected mode"" if you are lucky, and you should have access to the entire OST. You can then create a new PST, and copy everything in using the traditional drag and drop Outlook GUI.

Best of luck, this is not an easy situation."