For example, customers are in the United States, which has a country code of 1. They are used to dialing "5000" to call an internal DID. However, the dialing rules encounter "+15000" instead. In this situation, the call may fail for this user.
HOW TO FIX:
In the Skype for Business for iOS application, the user can press and hold the Delete button to backspace over the +<country code> entry.
Enterprise Voice administrators can manipulate dialed numbers by using normalization rules within the dial plan. They may also be able to use a trunk translation rule to do this, depending on the dial plan configuration.