I found It ...
Hklm\Hkey_Current_UserSoftware\Policies\Microsoft\ Office\11.0\Outlook\Preferences
Reg_Dword: ShowAutoSug
Value: 1




"B.J. Davis" wrote:

Outlook 2003 sp2.
I am trying to select the option to enable the "suggest names while
completing to, cc, bcc". however the whole section "When sending a message"
is greyed out.
What controls this? Is there a registry setting I can change?