https://www.tntware.com/tntconnect/help/faq_en/pages/what-phone-number-fields-sync-to-a-palm-treo.aspxTNTmpd maps it's contact fields exactly to Outlook. But once in Outlook, only certain phone number fields sync into the Palm Treo. Palm only supports 7 phone numbers per contact. Here is their mapping to Outlook: Palm Name Outlook/TNT Field work BusinessenCommunityServer 2008.5 SP2 (Debug Build: 40407.4157)