I bet this is the Microsoft add-in, which means it might be hard to get answers from the author. I don't know of any specific format requirement. It's also not clear whether the error is coming from Outlook itself or the add-in. I'd suggest just playing around with different numbers until you find what works.

--
Sue Mosher, Outlook MVP
Author of Microsoft Outlook 2007 Programming:
Jumpstart for Power Users and Administrators
http://www.outlookcode.com/article.aspx?id=54


"Ken Slovak - [MVP - Outlook]" wrote in message ...
Contact the author of that addin, whoever it is, and see what's going on.

--
Ken Slovak
[MVP - Outlook]
http://www.slovaktech.com
Author: Professional Programming Outlook 2007
Reminder Manager, Extended Reminders, Attachment Options
http://www.slovaktech.com/products.htm


"eazzy65" wrote in message
...
I am using the outlook Sms add-in but whenever I attempt to send a message,
I
recieve the message that the phone number passed in is invalid. I get my
"TO:" data from my contacts folder. Where do I change the phone number
format, and what is the correct format. If anyone knows how to resolve
this
problem your help will be greatly appreciated. BTW I connect my phone
using
bluetooth.