...
The table is set up in the VSS->Service-> Service Resource Scheduling->Customer Portal->Authentication->Maintain OpenID Identity Providers Configuration IMG node.
...
Access with resource token.
Customers without an account can perform all actions on their service orders and appointments by using links from received order processing notifications (email, SMS, ...). The notifications are sent from the VSSCommunication Framework in response to various events. The links in the notifications contain resource tokens that allow interaction with a single order or appointment.