NK2

[MBA]

I do not have this file. I had trouble with Outlook and I think it got
deleted. How can I get? I tried to reinstall Oulook and still did not get *NK2

 

[DL]

Its a hidden file, its only created if the option to to autocomplete /
suggest names is turned on within Outlook mail options, in whatever version
of Outlook you have.
Not having this file will not prevent outlook functioning, so any trouble
you have is something else

 

[Rich]

if the "trouble" you're having is that when you start to type someone's email
address, and it doesn't pop up below the To field, then yeah your .NK2 file
either got deleted or the AutoComplete got turned off.