Where is the Outlook 2010 Name Cache and what is the Suggested Contacts folder used for?

I think I was given incorrect information. I was told that with the advent of Outlook 2010 that the name cache was derived from the Suggested Contacts folder. I think I pretty much just disproved that. I changed the email address on one of the Suggested Contacts and when I did a new email and used the name cache it did not bring it in so.....

1) Where is the Outlook 2010 or 2013 name cache kept and how do you edit it?
2) What is the Suggested Contacts used for?
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Mark GalvinManaging Director / Principal ConsultantCommented:

Here is how to import the NK2 file into OLK2010 https://support.microsoft.com/en-us/kb/980542

Locations of the file in various versions http://www.nirsoft.net/utils/nk2_file_location.html 

Hope that helps.

MASEE Solution Guide - Technical Dept HeadCommented:
-->1) Where is the Outlook 2010 or 2013 name cache kept and how do you edit it?

-->2) What is the Suggested Contacts used for?
Suggested Contacts is a way for administrators and users to control AutoComplete cache contents directly through the Outlook interface. Addresses added to Suggested Contacts are used for AutoComplete and addresses entered as recipients of email messages that do not reside in the user’s Contacts folder are added to Suggested Contacts. You can copy and paste contacts from a contacts folder to Suggested Contacts to add their addresses to your AutoComplete cache.

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LockDown32OwnerAuthor Commented:
This is what I am finding. There are conflicting answers given on the internet. Some articles say that the AutoComplete cache is stored in the PST others say it is a file (just like the old NK2).

Most of the articles about Suggested Contacts say it is completely unrelated to the AutoComplete. That it is simply Contacts you have sent to but are not in your Contacts folder.
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Mark GalvinManaging Director / Principal ConsultantCommented:
Auto Complete and Suggested Contacts are two completely separate things

Autocomplete is a list of addresses that appear when you start to type into the To field. In 2010 they are stored in your mailbox in a hidden folder. This means the list follows you around from PC to PC. With the old NK2 file that didn't happen.

Suggested Contact is a separate list of contacts that are made up of email users you have received email from to sent email to,  that are not in your contacts folder.
LockDown32OwnerAuthor Commented:
Well... from what I have seen the autocomplete is embedded in the mailbox and does follow the user around but....

 Mark are you saying from your first post that (with Outlook 2010 and XP) it is still a separate file in the profile and not embedded? where as Outlook 2010 under Windows 7 it is embedded in the mailbox? That the version of Office senses the OS and treats the autocomplete radically differently based on the OS?
Mark GalvinManaging Director / Principal ConsultantCommented:

The nirsoft article may not be accurate.
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