Saving Backup Copy Of Your Account. Launch Outlook on the local machine. Only information for one account can be exported at a time.

Go to the Outlook PST file location to find the backup file you created. Select Consolidate files. Its a good idea to change the name of the file the last part of the path.
Select Consolidate files.
Login to your Gmail account and navigate to Settings Forwarding and POPIMAP. Make sure that the Include subfolders check box is selected. You will only see 1cab file if you use Backup. Select your the Backup File or Portable Company file you want to make a local copy.