Further research indicates function is known as "Intellisense"--also, may
have started after installing IE 7--I'm going to try uninstalling it

"Dick Benton" wrote:

Previously (although I don't know "before what") when I entered a phone
number with no spaces, Outlook automatically expanded it, and, if I put in
only seven numbers, put my default area code in front in parens. It's stopped
doing that, and I can't find any option anywhere.