1. Click Management
  2. Click System Defined Fields
  3. Click Country Codes
  4. Below the Values heading, select Show Disabled Values
  5. Search for the country you would like to add
  6. Click the Disabled link below the name of the country
  7. Click Save and Finish

If the country that you would like to add is in the list of disabled values, we can also add a value for this country
  1. Click Management
  2. Click System Defined Fields
  3. Click Country Codes
  4. Enter the two letter abbreviation for the country
  5. Enter the name of the country in the Description field
  6. Click Add Value
  7. Click Save and Finish