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Outlook Autocomplete (.nk2 and .dat) Files - Move and Merge

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    Outlook Autocomplete (.nk2 and .dat) Files - Move and Merge
    How to Move and Merge Microsoft Outlook Autocomplete (.nk2 and .dat) Files
    Published by tom982 is offline
    12 Mar 2011
    Outlook Autocomplete (.nk2 and .dat) Files - Move and Merge

    How to Move and Merge Microsoft Outlook Autocomplete (.nk2 and .dat) Files

    Screenshot missing - will replace soon.

    This is the auto-complete feature in Microsoft Outlook. As you can see, I have only typed ti and it is displaying an email which I may want.

    These emails are stored in a file which Outlook has created however when one reinstalls Windows or upgrades to a more recent version of MS Office, this file may be lost.

    This .nk2 or .dat file can be located in:

    XP: drive:\Documents and Settings\<user>\Application Data\Microsoft\Outlook
    Vista: drive:\Users\<user>\AppData\Roaming\Microsoft\Outlook
    Windows 7 drive:\Users\<user>\AppData\Roaming\Microsoft\Outlook

    Note   Note
    This tutorial will show you how you can merge or transfer your Outlook autocomplete email lists. Should you reinstall Windows or upgrade to a newer version of Office, you will need to do this if you want to keep the list of emails that are shown in the autocomplete form


    What happened to me was I upgraded to Office 2010 and I was using Outlook 2010 for a while before I remembered that I hadn't transferred the .nk2 file. So I was left with a .nk2 file and a .dat file, both of which I needed the contents of.


    warning   Warning
    • Make sure that you have closed Microsoft Outlook before you continue.
    • Please make sure you make a backup of the .nk2/.dat file before you alter it in any way


    warning   Warning
    Make sure that you only open these files in NK2Edit by using the File > Open .NK2 File. Do NOT open them by double clicking on the file in Windows Explorer.



    1. First of all, we are going to need to get the .nk2 files that we need. The location of your .nk2 file will vary depending on your OS (Operating System) and version of Office. The table below should explain where you can expect to find your .nk2 file:

    NOTE: I would appreciate it if you guys can confirm these locations, I think they are right but I am not sure.

    Note   Note
    In Office 2010, the file is called something along the lines of Stream_Autocomplete_0_188E43DE2C399A47B227874D14929BC7.dat (yours will not be the same, this is what mine was).


    2. Now you've found the .nk2/.dat file we need to open it up in NK2Editor:
    Here is the website of it: NK2Edit: Edit AutoComplete files (.NK2) of Microsoft Outlook

    This little program is portable and doesn't need installing. So download it and extract the files from the .zip file. There should be one called NK2Edit.exe.

    Note   Note
    I will not be able to provide screenshots from now on because my .nk2 file has my personal contacts in it and I don't think that they would appreciate me putting their emails on the internet.
    3. You will need to open one instance of NK2Edit per file you wish to merge - the merging of 3 files requires 3 windows. Resize the windows so you can clearly see each window on your screen. Now open the files in their corresponding windows by pressing File > Open .NK2 File.

    4. In one of the windows, select all of the entries in the .nk2 file by pressing Ctrl+A. Then you will need to right click on them and select Copy.

    5. Now we need to switch over to the other window and press Ctrl+V to paste them. You should now see the contents of both .nk2/.dat files in the same list

    6. Now you will need to save the new .nk2/.dat file.

    warning   Warning
    Make sure you have backed up the .nk2/.dat file that is currently in use before you proceed

    Press File>Save As... and then chose the type of file that is currently in use:

    For Office 2003/2007 use: Outlook .NK2 files (*.nk2)
    For Office 2010 use: Outlook 2010 AutoComplete .dat file (Stream_AutoComplete*.dat)

    You will need to save this in the location that you found the .nk2/.dat file in the first place (see table at start). Make sure that you save it in the correct place:the same place that the current .nk2/.dat file is located in.

    Your old .nk2/.dat file will still be there, edit the name of the file and add BACKUP to the end of the name. You will need to save your newly created .nk2/.dat file AS THE SAME NAME AS THE OLD .NK2/.DAT FILE WAS CALLED (before you added backup to the end). For example

    Say you took a .nk2 file from one computer, lets call it aaa.nk2, and wanted to merge it with a .dat file on your computer, lets call it bbb.dat. You would need to open them up, merge the two files. Change the name of bbb.dat to bbb BACKUP.dat and you will need to save the merged list of contacts as a .dat file, with the same name of whatever bbb.dat was called and in the same place as bbb.dat was found.

    Then reboot your computer and open outlook, your autocomplete list should now contain entries from both files.
    Hope this helps guys!

    Tom

    If you need any further information, or you don't like the way I've done this tutorial, give me a shout and I'll see what I can do or you can go to:

    How to merge 2 or more NK2 files

    And follow their instructions

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    Applies to

    All Vista Versions
    64 Bit & 32 Bit


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    Re: Outlook Autocomplete (.nk2 and .dat) Files - Move and Merge

    Thank you for the feedback Alison! Tutorial updated accordingly

      My System SpecsSystem Spec

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    Re: Outlook Autocomplete (.nk2 and .dat) Files - Move and Merge

    Quote Originally Posted by tom982 View Post
    Thank you for the feedback Alison! Tutorial updated accordingly
    Is it just me, or is this like the third time posts have been deleted from this thread

      My System SpecsSystem Spec

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    tom982's Avatar

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    Join Date : Mar 2010
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      Thread Starter

    Re: Outlook Autocomplete (.nk2 and .dat) Files - Move and Merge

    Quote Originally Posted by niemiro View Post
    Quote Originally Posted by tom982 View Post
    Thank you for the feedback Alison! Tutorial updated accordingly
    Is it just me, or is this like the third time posts have been deleted from this thread
    I was afraid my post would look like that! Someone contacted the forum through the support email, I told Shawn to pass on my regards, but I thought it might be nice to post it here too.

      My System SpecsSystem Spec

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    Banned

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    Re: Outlook Autocomplete (.nk2 and .dat) Files - Move and Merge

    Quote Originally Posted by tom982 View Post
    Quote Originally Posted by niemiro View Post
    Quote Originally Posted by tom982 View Post
    Thank you for the feedback Alison! Tutorial updated accordingly
    Is it just me, or is this like the third time posts have been deleted from this thread
    I was afraid my post would look like that! Someone contacted the forum through the support email, I told Shawn to pass on my regards, but I thought it might be nice to post it here too.
    Fair enough, but I am still sure that this hasn't been the only time. Or maybe I am just confused!


      My System SpecsSystem Spec

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    tom982's Avatar

    ٩(͡๏̯͡๏)۶




    Join Date : Mar 2010
    England
    Posts : 3,642
    Windows 8.1 Pro x64
    Local Time: 08:25 AM
    uk uk england

      Thread Starter

    Re: Outlook Autocomplete (.nk2 and .dat) Files - Move and Merge

    Quote Originally Posted by niemiro View Post
    Quote Originally Posted by tom982 View Post
    Quote Originally Posted by niemiro View Post

    Is it just me, or is this like the third time posts have been deleted from this thread
    I was afraid my post would look like that! Someone contacted the forum through the support email, I told Shawn to pass on my regards, but I thought it might be nice to post it here too.
    Fair enough, but I am still sure that this hasn't been the only time. Or maybe I am just confused!

    Well you're not the only one! That seems to ring a bell with me as well

      My System SpecsSystem Spec


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