"Zeidel" wrote in message
...

I'm trying to type an e-mail to a person whose contact info is in my
Contacts
in Outlook. In the past, even if I had not sent an e-mail to this person
previously, I could type their name and Outlook would link it to my
contacts
and allow me to send the e-mail. This is no longer happening.

Nope. Only the long-obsolete Outlook 2000 in Internet Mode Only could do
that and then only because it was using the Windows Address Book, not its
Contacts folder.

In fact, when I click on the "To" button to select the contact/e-mail
address, it tell me i have an invalid ID (and not all contacts appear).

Configure the Outlook Address Book service in your mail profile.
http://support.microsoft.com/kb/287563/en-us
--
Brian Tillman [MVP-Outlook]