Hi,
This post is related to Internet telephone field mapping done in Outlook after sync.
After sync is completed, Internet telephone number is mapped to User field of Outlook. In outlook,
Select a contact which has got internet telephone, In Contact options like General Details Activities Certificates and All fields-> Select from -> Select All contact fields from drop down list. There you can see the User field 1, 2 and so on , in this option you can view your internet telephone field