In the Open box, type outlook.exe /importnk2, and then click OK. In the Mail Setup dialog box, click Show Profiles. By default, the profile name is “Outlook.” To check the profile name, follow these steps: Click Start, and then click Control Panel. nk2 file must have the same name as your current Outlook 2013 or Outlook 2016 profile. nk2 file is in the following folder: %appdata%\Microsoft\Outlook nk2 files into Outlook 2013 or Outlook 2016, follow these steps: nk2 file (that should match the older Outlook profile) to match the name of the current Outlook profile name being used. nk2 file you will need to rename the most currently modified file to. nk2 file located in directory (C:\Users\ username\AppData\Roaming\Microsoft\Outlook) this file is hidden so you will have to show hidden files from the Folder options in control panel. In Outlook 2007 or earlier: this file will be a. Outlook 2010, Outlook 2013, and Outlook 2016 let you import the older. Outlook 2010, Outlook 2013, and Outlook 2016 store the AutoComplete list as a hidden message in your primary message store. Microsoft Office Outlook 2007 and earlier versions store the AutoComplete list in an nickname (.nk2) file on the disk. Note: The AutoComplete list for Outlook is specific to Outlook and is not shared by Outlook Web App (OWA).