All versions of Outlook since Outlook 2003 have had a feature called Auto-Complete. Auto-Completion “remembers” recipient names and email addresses that you have used before and offers to complete the email address as you type characters. This works within Outlook and OWA 2010.
In Outlook 2003-2007, the Auto-Completion (aka NickName) data is stored in a hidden N2K file. This file is located in the following path:
This can usually be shortened to:
Microsoft changed the way Outlook 2010 handles Auto-Completion data so that it supports roaming users. Recipient AutoComplete lists are now stored on the Exchange Server. A user’s recipient AutoCompletion list is now available to any computer on which Outlook 2010 runs that is connected to the same Exchange account.
This article discusses how to migrate the older format N2K file to the new format on a new computer. This is helpful for when a user gets new hardware and wants to maintain their current Auto-Complete data. A good example is when an executive using Outlook 2007 gets a new laptop with Outlook 2010 pre-installed.