Outlook provides no built-in way to alter the autoformatting of a phone number field. You would need to write VBA code, an add-in, or code behind a custom form to run either when the item is saved (Item.Write event) or as each property changes (Item.PropertyChange event) in order to (a) prefix the phone number with some character (in order to bypass the built-in formatting) and (b) parse the number to make your other formatting change -- all of this for the 16 phone number fields.
"clintjjohnson" <clintjjohnson@discussions.microsoft.com> wrote in message news:6AA43248-7859-4B6E-871D-EF863776EAA0@microsoft.com...
> The default contact form's telephone number fields format the numbers as
> (xxx) xxx-xxxx. I want them to be formatted as xxx.xxx.xxxx
>
> How do I make this happen...?
>
> --
> Clint Johnson
> Homewood, IL