MS Outlook autocomplete cache file

MS Outlook autocomplete cache file 

path for file:

Windows XP

C:\Documents and Settings\username\Application Data\Microsoft\Outlook\outlook.NK2

Windows 7

C:\Users\username\AppData\Roaming\Microsoft\Outlook\outlook.NK2

Maximim emails key

H_KEY_CURRENT_USER\Software\microsoft\Office\10.0\outlook\

DWORD MaxNicknames default it is 1000