To shut off an exchange, navigate to your augmented line item in Xandr.
1. Under Basic Setup you will need to have Supply Strategy > Deals > Specific Deals checked off to see and target multiple exchanges in your dashboard.
2. Scroll down to Targeting - the first section labeled Deal will display exchanges on the lefthand side under Sellers.
3. The specific exchanges/deals you are targeting will be displayed on the righthand side under Selected Deals. Simply click the x to remove an exchange from your targeting. Hit Save to apply these changes.