Customers can increase or decrease user counts for per-user SaaS subscriptions at any time. The license subscription terms will remain the same regardless of any volume or plan upgrades. Plan changes are also supported for existing subscriptions via the application programming interfaces (APIs). Publishers can use API calls to change the customer's subscription plan. We encourage independent software vendors (ISVs) to consider a customer's user experience within the SaaS solution for upgrade and downgrade situations.
If the plan is changed for an existing subscription, the term remains unchanged, and the cost is prorated according to the duration of the remaining term.