The file that stores the auto-complete list can be found in the user profile using this path:
%USERPROFILE%\AppData\Local\Microsoft\Outlook\RoamCache
This will translate to something like C:\Users\UserName\AppData\Local\Microsoft\Outlook\RoamCache
The file that stores the auto-complete list can be found in the user profile using this path:
%USERPROFILE%\AppData\Local\Microsoft\Outlook\RoamCache
This will translate to something like C:\Users\UserName\AppData\Local\Microsoft\Outlook\RoamCache