Very common problem with solutions posted here almost daily.
http://home.indy.rr.com/russval/addressbook.htm#Lose

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Russ Valentine
[MVP-Outlook]
Ok, that worked, sort of, but it's displaying as "Address Book" instead of
"Contacts," since that's what I typed in. I tried typing in "Contacts,"
also, and it just gave me the word "Contacts" twice as options for retrieving
addresses. It still gives me the same error message when I click "To:" in a
new e-mail, but now when I click "Ok," at least I'm able to access the
addresses in my Contacts folder under "Address Book." I haven't been able to
find any way to make this the default location instead of what it's referring
to as "Contacts," which it's still telling me it can't access.
> Very common problem with solutions posted here almost daily.
> http://home.indy.rr.com/russval/addressbook.htm#Lose
[quoted text clipped - 5 lines]
> > way. I noticed this before I ran the Repair Tool, and the Repair Tool did
> > not fix this problem either.
Diane Poremsky [MVP] - 28 Dec 2005 17:02 GMT
you need to remove the erroneous contacts folder. go to tools, email
accounts, view or change address books - select the Outlook address book
entry and choose Change. You should see two - the good one and bad one.
Delete the bad one. If you aren't sure which is the good one, delete both
and close the dialogs then go to the contacts folder in Outlook and right
click, choose properties and on the address book tab, enable it as an
address book.
This should set the good one as the default when you hit To, if not got to
Tools, Address book and look on it's tools, options menu - select the book
you want to see first.
> Ok, that worked, sort of, but it's displaying as "Address Book" instead of
> "Contacts," since that's what I typed in. I tried typing in "Contacts,"
[quoted text clipped - 21 lines]
>> > did
>> > not fix this problem either.
Melissa - 28 Dec 2005 20:36 GMT
Yay!!! It's working now! :D Thank you all for your help! You guys are
awesome!
> you need to remove the erroneous contacts folder. go to tools, email
> accounts, view or change address books - select the Outlook address book
[quoted text clipped - 7 lines]
> Tools, Address book and look on it's tools, options menu - select the book
> you want to see first.