Greetings, I had the same problem and solved by doing the following:
1) Go to Control Panel in Windows...use the Start Menu
2) Go to Phone and Modem Options
3) Under the Dialing Rules tab, chose to "Edit" your location
4) In the "Edit Location" window, enter your area code and whatever other
information is applicable.

You should be good from here. I hope this has been helpful. Have a good one.

Best,
SeanXavier


"rgille" wrote:

How can you change the default area code in Outlook 2007? (I particularly
want to remove the leading "1" country code that appears by default.) It was
set incorrectly by the prior user of my computer. Thanks.