Welcome to your interview.
The question is on your right: Enterprise Adoption Success Metrics. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
What metrics would you track to determine if an enterprise customer is successfully adopting Dropbox after their initial onboarding?