NK2 file in Windows 7?

The Outlook 2003/2007 default NK2 file location is the same in Windows 7 x64 and x86 -- C:\Users{username}\AppData\Roaming\Microsoft\Outlook\zzzzzzz.NK2 (z = Outlook profile name). This also applies to Vista and Server 2008.

The Outlook 2010 NK2 file is actually a DAT file and is located, on the above operating systems, at C:\Users{username}\AppData\Local\Microsoft\Outlook\RoamCache\Stream_Autocomplete_y_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.dat (y = file index, x = random 16-byte key in hex form).

If you haven't unchecked 'Hide extensions for known file types' under Tools > Folder Options > View, then the file will just be called "Outlook" or "Default" (whatever your Outlook profile is named), instead of Outlook.NK2 or Default.NK2. Also, Windows 7 classifies it as an "Office Data File" in the 'Type' column.

If this file is not present, Outlook will create a new one when you open the program. Hope this helps!

I know where the NK2 file is in XP but not Windows 7. I have a 64bit machine. I have many email addresses. Help.

Firstly you should NOT use the nk2 file to store contacts. If you want to keep contacts add them to your Contacts folder.

The location in 32 bit Windows 7 is C:\Users{Your Username}\AppData\Roaming\Microsoft\Outlook

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