Using Admin logon in Safe mode Search for all *.PST files and find your
biggest most recent postoffice file. Perhaps that is it. Then you can
move/rename that file to replace the existing new blank one created by your
new email account settings setup. Or fo to File Data Management and ADD
command and then select that PST file. But warning this will not be your
default Personal Profile, so with this method you need to drag and move the
emails over to your current Personal Folder then you can disable the old
File using the REMOVE command in Outlook DAta File Management.,, whic only
deactivates it not delete.