Move or copy auto-complete list from Outlook 2010
Find this file: Stream_autocomplete (on the source computer).
In this location: C:\Users\%username%\AppData\Local\Microsoft\Outlook\RoamCache
could have a name like this: Stream_Autocomplete_0_8D3BCAEDYTGFEB43A6DDDDDD8B2B89BF
Close Outlook on target computer, and copy this file to same location.
You have to rename file, so it overwrites the name from same file on target.
