Which stakeholder is responsible for activating failover process, to transfer customer operations to an unaffected...

ServiceNow operates on an Advanced High Availability (AHA) architecture.

Responsibility: The management of this architecture, including data replication and disaster recovery, is the sole responsibility of ServiceNow.

The Process: In the event of a catastrophic failure at a primary data center, ServiceNow operations teams are responsible for executing the failover procedures to shift traffic to the paired secondary data center. This is a managed service; the customer does not have buttons or controls to switch data centers themselves.