RGproperty,

Since you have removed the Excahnge settings, the only thing that can remain is your .PST file. Exchange creates a .PST local copy of everything in your mailbox. If you did not remove your profile its possible the .PST will remain on your PC.

Computer main Drive (C > Users > (User Name) > App Data > Local > Microsoft > Outlook

If the data is not located in this folder, it may be possible your service provider can provide a backup of your mailbox prior to the down-grade.

Good Luck.