Q:

where is "Outlook: "Create new mail" -> to: (Email address cache)?" stored in

I changed a laptop in an Active Directory Environment. 
Because the Userprofile got really big in the last past years, I decided to create a new Profile. I did the following Tasks.

deattached his Exchange Mailbox in
System Manager
renamed the User to x-old
created a new user with same
privileged etc.. (acctually i copied
the old one.)
attached the mailbox to the new user.
logged in with new user and copied
some files from the old profile..

When the User starts outlook, everything works fine except the "email address history" is missing. You know that completion when you create a new mail and type into the "TO:" field for eg. an "a" it gives you a couple of suggestions like "amail@..", "amessage@..".
Where are these informations stored in? 
Which file do i have to backup from the old profile?

A:

The files you are looking for are at %USERPROFILE%\Application Data\Microsoft\Outlook and they have the extension NK2.
References and to a few tools for managing the nickname cache.  

http://www.slipstick.com/emo/2005/up050609.htm#nk2
http://www.slipstick.com/problems/nicknamecache.asp

