After exporting all of the folders in Microsft Outlook and reimporting into Microsoft Outlook on a new computer, my boss did not have his distribution list and autocomplete (when you type the first letter of an email address) working. Although the contacts, inbox, sent, deleted, drafts, calendar..etc were there; the aforesaid features were not working correctly after being imported.
To make these features work (You will have to go to My Computer -Tools, Folder Options, View and show hidden files and uncheck hide file extensions), go to -
C:\Documents and Settings\username\Application Data\Microsoft\Outlook
-find the Outlook.nk2 file and copy it from the old computer to the new computer in the same outlook folder.