Phone 2018 - Outlook 2016 Phone Number Format. Outlook 2016 Contact Phone Number Formating - Spiceworks - Using +1 (or +XXX where XXX is the country code) is the best way to store a phone number in a mobile phone. Changing the way Outlook stores numbers may also change the way the phone number is stored in the mobile phone if you do any sort of synchronization between Outlook and the mobile phone.. How to automatically add Country Code to Phone Numbers in - I recently updated from Outlook 2010 and Windows 7 to Outlook 2016 on Windows 10. A feature that on which I have come to rely is now failing. In Outlook 2010, when I entered a phone number without specifying a country code, the number was automatically reformatted in the local (United States) format. That is, the country code of "+1" was added, the area code was surrounded by parentheses, and . Display numbers as phone numbers - Excel - support.office - If the predefined phone number format doesn't meet your needs, you can use it as a starting point to create your own custom format. For more information, see Create or delete a custom number format. Expand your Office skills.Phone Number Formatting for Outlook and Smartphones - Number formatting can be easily prevented in Outlook by typing the number in the field on the contact form and not using the Check Phone Number feature... . Tip 1115: Contact's Phone number formatting - Outlook Tips - Tip 1115: Contact's Phone number formatting I'm using MagicJack and it requires that all numbers have an area code, but no +1. I figured out how to require the area code for my home location, but is there a way to eliminate the +1 on all area codes other than setting up area code rule for each area code?.. .