You can't easily change them after the fact, but you can control it for new
numbers. See
http://www.outlook-tips.net/archives/2009/20090410.htm for one solution.
--
Diane Poremsky [MVP - Outlook]
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"Steve" <(E-Mail Removed)> wrote in message
news:45E365CD-64B5-4C3E-AC12-(E-Mail Removed)...
> How do I change the default phone number format eg (xx) xxxx-xxxx to
> xxxxxxxxxx?