Where does Microsoft Outlook store the list of contacts for auto completion when typing contacts?

Question

We're having some trouble with Outlook and history has shown uninstalling and reinstalling Office usually resolves the issue.

But when Outlook is reinstalled users lose the ability for previous address book contacts names to appear when you begin typing the first few letters.

They need to start rebuilding that listing by sending more emails.

Is this data stored in a file? That could just be copied from the current install and placed into the new install directory?

This is on Windows Vista and using Outlook 2007.

Answer 1

Looks like it's stored in a binary file in the directory C:\Users\[USERNAME]\AppData\Roaming\Microsoft\Outlook. The extension is .NK2 and the name most probably "Outlook" (default profile name).

You might have to display the hidden and system files to access this directory.