On This Page 
    Boarding in the Business Center
    Enable 
Unified Checkout
 for your merchants through the Business Center. To add it while you are adding products for merchants, the system displays
            all available products to enable. Under the Payments section, find
                Unified Checkout
 and select the enable toggle. To add 
Unified Checkout
 after creating the merchant account, go to
                Manage Merchants
 and select the appropriate transacting
            organization ID.The 
Unified Checkout
 Integration section in the Merchant Boarding Guide
 provides information about using the Business Center for boarding merchants for Unified Checkout
.