Old versions of Outlook had a feature built in for this, but beginning with 2002 there is no feature.
However, you may want to try this: (Remember, backup your registry first!)
Open your registry editor and navigate to the following key:
HKEY_USERS\S-1-5-21-1343024091-507921405-725345543-1003\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook
Export the entire Outlook key to a file and you got your email accounts.
To restore this, simply import the backup file into the new computer's registry.
You may need to delete the Outlook key off the new computer first.
The name of that long key beginning with S under HKEY_USERS will be different for every computer. But it should begin with the S and something be followed by a long numbers and this (-)
Hope this helps