CRM 2016 (Dynamics 365) introduces SetProcessRequest which can be used to activate a business process flow for a given record programmatically. However, it does not always work if IOrganizationService is created by using SYSTEM. To replicate it,

1. Create a plug-in that executes on Post Operation stage of Create message on an entity (e.g., incident)
2. Create an impersonated organization service in the plugin

   IOrganizationServiceFactory serviceFactory = (IOrganizationServiceFactory)serviceProvider.GetService(typeof(IOrganizationServiceFactory));
   IOrganizationService service = serviceFactory.CreateOrganizationService(null);

3. Use that service to execute the request

   service.Execute(new SetProcessRequest() { ... });

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