What is the most convenient way to get an automated report on what to bill to each customer that we have under management?

We would like to automate the process as much as possible so every month we can get a report for all our tenants and every subtenant in the postpaid model.

Some clients add or remove agents every month.

So we need a very quick way to get an excel/csv file in the end of the month with the number and type of licenses for each client under our main MSSP model.

We want to make it as automated as possible to get that report in the end of the month.

Can you help us find the easiest way?