K. Orland wrote:

You can quickly and easily create a new NK2 (autocomplete file) using
the following work-around:


In MS Outlook, go to tools, options, mail setup, send/receive.
Uncheck the "Send immediately when connected box". Next, press the
Send/Receive Button (in Options) and uncheck "Schedule an automatic
send/receive". Next disconnect your computer from the internet by
removing your network and/or telephone connection. Open a new
e-mail, press the bcc or to or cc button, select the contact folder
you would like to bring into your NK2 (autocomplete) file. Select
all names by highlighting first and last contact and then add them by
pressing the OK button at the bottom. With your computer
disconnected, press the send button. This will automatically
populate your autocomplete file with all of the selected e-mail
addresses. Next, go to your Outbox and delete the e-mail(s) that you
just created. Go back into your Tools, Options, Mail Setup,
Send/Receive and change your options back to the original settings.
Remember to put your mail settings back and plug in your removed
cables.

The above information is courtesy of Russ Valentine, Outlook MVP.

Simpler: Open the Contacts folder, select all the entries with CTRL-A, then
click ActionNew Message to Contact. In the new message window, click Check
Names or press CTRL-K. That will resolve all the addresses and add them to
the NK2 file. Then close the new message window without saving the changes.
No screwing around with any settings or connections required.
--
Brian Tillman