The Priva Notification Center was not targeted to be a full featured alarm management service. For example, a planner (scheduling) is not supported.
Multiple solutions are available in the market like OpsGenie, VictorOps or PagerDuty which can easily be connected to the Notification Center. For companies with a lot of buildings, different brands and many engineers to service them, these solutions provide a better total solution than we could.
Use email forwarding to the external service to set this up.