eSales - Set Primary Account Address
The workflow for setting the primary account address is shown in the following figure.

When the eSales - Set Primary Account Address workflow is called by the SS Save Shipping Details Process (see SS Save Shipping Address Details Process), it determines whether the B2B user has a primary account address.
If so, nothing is done.
If not, the current address is saved to the User Profile (eApps) business component as the primary address for that B2B user.