In general, Trusted Application scenarios can be grouped into two categories:
Your Service Application starts the scenario: Your app starts sending requests to the Skype for Business Platform Service through the Trusted Application API to call a particular capability (eg. send an instant message)
Skype for Business Online events start the scenario: The Skype for Business Platform Service will send an event to your Service Application (eg. incoming instant message), indicating that Skype for Business received a request directed to your Service Application endpoint
Common Scenarios
Notifications COMING SOON
Customer Care: Anonymous Customer Web Chat with an Agent COMING SOON
Voice Scenarios: Custom IVRCOMING SOON