When you add a contact without entering a country, Microsoft Outlook, by default, uses the country selected in Control Panel > Regional and Language Settings > Format selection.
This change will apply to new Contacts only. When you change country in Regional Settings, it doesn’t affect existing contacts.
Update the Country field for Existing contacts
The procedure for updating the country field is very simple: group by the Location field and drag between groups.
Outlook 2010 and up:
- In the Contacts folder, switch to the List view, then Arrange By: Location.
- Right Click on Country/Region field name and choose Group by this field.
- Select those contacts that have the wrong country.
- Drag the selected contacts to the correct country group heading.
- In the Contacts folder, switch to the By Location view. (Veiw menu)
- Select those contacts that have the wrong country.
- Drag the selected contacts to the correct country group heading.
Note: you can use this same process to change many other editable fields: just group by the field that a large number of contracts need changed to and drag the contacts between groups.



