FAQ: Calculating number of users in billing model in SaaS offers

I'd also suggest reviewing https://learn.microsoft.com/en-us/partner-center/marketplace/plan-saas-offer#saas-pricing-models

For a given plan, as a publisher, you set the minimum and maximum number of users for which that plan applies. Some partners use this flexibility to create a tiered pricing structure. For example:

• Plan A: 1 user up to 500 users is charged $XX/per user
• Plan B: 501 users - 1000 users is charged $YY/per user

As a customer, at time of purchase, I am prompted to enter the number of users or seats I am purchasing for that SaaS plan (from the available range defined by the ISV). For example, if my company has 200 employees and I want everyone to have a user license for the software, I'd purchase 200 "Seats". Customers may also https://learn.microsoft.com/en-us/marketplace/saas-subscription-lifecycle-management#change-number-of-users or seats at any time during their subscription.

This data is available to publishers, in the https://learn.microsoft.com/en-us/partner-center/orders-dashboard#seats-sites-and-quantity