Hello,
This is for the outlook auto complete list.  First close Outlook.

If the prior user account is still saved on that workstation, you can go into the user profile folder and find the nk2 file in Outlook folder.  You will need to have hidden files and folders shown to find it.  You'll need admin privileges to traverse the folders.

C:\users\olduserprofile\AppData\Local\Microsoft\Outlook

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There should be a file in there like olduserprofile.nk2.  If that file is there, then you can copy it to the same path but in the new user profile to replace that nk2 file, it may need to be renamed to match.  However, this will wipe out your new auto-complete entries recently made.

Hey there,

In order to resort this problem all you need to do is check that the NK2 file exists or not. If it exists follow these steps:

1. Copy the old nk2-file to the following folder

2. Rename the nk2-file to the name of your mail profile

Outlook will now process the nk2-file and import it into a hidden property of the mailbox but not in the actual Suggested Contacts folder in Outlook 2010 (Outlook 2013 no longer uses this folder).


follow this process, hope this will sort out your problem. For any further queries feel free to contact back.

*but this is only applicable for Outlook 2010 and below.

Regard
Phil Coulson

I guess I should have mentioned, older Outlook versions were 2007 and 2010. The 2007 users have now been migrated to 2013. I do have access to the old user accounts in C:\Users\...\Outlook\ however, even for the former 2007 users there are no .nk2 files.

cpmcomputer's link say, "In Microsoft Outlook 2010, the Auto-Complete List is no longer saved in a file with an extension of .nk2. The Auto-Complete List entries are now saved in your Microsoft Exchange Server mailbox or in the Outlook Data File (.pst) for your account."

cpmcomputer:

Outlook 2010/2013 ...  The entries are stored in the users profile as an auto stream file

I have the .pst files exported from the original Exchange .ost's. So, where can I find these auto-complete  "stream" files?

Ok first for outlook 2007

The autocomplete feature is contained in an nk2 file in the users profile
It is located as a hidden file so make sure
" show hidden files and protected system  files is set and also show extensions for known files is ticked
There are three tick boxes  

See this link for details
https://m.youtube.com/watch?v=wxIIskKmUQA
That should allow you to see the nk2 files
In the old profiles
I think it is stored at
Users/oldprofile/appdata/local/Microsoft/outlook
(This from memory "local" may be "roaming"
So you may need to fish around
Sorry I do not have a pc to refer to and many google articles specify the wrong folder

Copy the file to the same location in the new profiles and run
Outlook.exe /importnk2 from an elevated command prompt

For outlook2010 a bit more complex
https://vinny4tech.wordpress.com/2012/11/14/outlook-2010-to-2013-where-did-my-autocomplete-go/

Caution these processes will overwrite any new folders since you moved the profiles

Hey there once again,

Okay, so the location for the auto-complete  "stream" files is,

C:\Users\YOUR-USER-NAME\AppData\Local\Microsoft\Outlook\RoamCache\

This folder will contain "Stream_Autocomplete.dat" files. For further reference please visit the link below:
http://support.microsoft.com/kb/2806550

I guess this might solve your problem. In case of any doubt feel free to discuss.

Best Regards
Phil

Altering the folder view options did the trick helping me locate nk2 files. For Outlook 2007 these files are in C:\Users\%username%\AppData\Roaming\Microsoft\Outlook, per Phil Colson's post.

Also, for Outlook 2010 users, I did find the Stream_Autocomplete...dat files in C:\Users\%username%\AppData\Local\Microsoft\Outlook\RoamCache\

I've successfully copied the 2010 Stream_Autocomplete file per cpmcomputers' link. I've asked the user to let me know if it works.

Meanwhile, slight wrinkle with the nk2 files. I have located and copied them. But, the 2007 users have now been upgraded to 2013 directly. So, how do I import those nk2 files? Can I still do: outlook.exe /importnk2? I don't want to experiment!

Agree with phil
His procedure should sort your final issue

Looks like those procedures for both Outlook 2010 and  Outlook 2007 -> 2013 worked! Thanks! Great to have access to such expertise.