Question
I updated the subscription in my production account. How do I sync my sandbox to match products and add-ons?
Answer
The subscription on your sandbox matches the subscription you had on your production account when you first created the sandbox. If you update your subscription, it won't automatically sync over to your sandbox. To sync your subscription, select Sync products and add-ons from the expansion menu of your sandbox.
For more information, check this article: About Zendesk sandbox environments.