Svilen Pachedzhiev, you wrote on Tue, 27 Mar 2007 09:43:29 +0300:

That is a good idea for why not working the name suggestion function (even
thogh it works that way in OE6 without having a populated autocompletion
cache)

OE completes the addresses with those in your addressbook. However,
Outlook is using a file named "Profilname.NK2" for autocompleting. This
cache will be filled with all addresses you have ever typed in an email
address field (To, Cc, Bcc), regardless you do in manually or using the
Outlook addressbook.
You find the NK2-file in C:\Documents and
Settings\%Username5\Application Datas\Microsoft\Outlook

--
Best Regards
Christian Goeller
http://www.outlookfaq.net