It has never been necessary nor even recommended to remove the country code
from Outlook's phone numbers. Dialing is controlled by configuring dialing
rules correctly.

Signature
Russ Valentine
[MVP-Outlook]
> Outlook adds the country code to the local phone number when adding
> contacts
> (+31 for the Netherlands). How can I remove the country code when making a
> local call? Setting the country code in the dialing propererties doesn't
> work.