As the company administrator you have the ability to set the “Company Site DDI” by selecting on the “Current Site DDI Choose One” tab. Once clicked you can then select a Site DDI from the list of numbers allocated to your company’s profile, before clicking on the “Update” button to implement this for this site.
When this has been set within the main site management screen you will be able to see the current site DDI and edit this as required by clicking on the tab