On the Desktop Capacity and Model Definition Page, you can download the Customer Usage Report and the Concurrent Users License Report.
Customer Usage Report
To download the Customer Usage Report, click the Download Usage Report link under the Standard Capacities list on the left of the page.
The report downloads in .csv format.
The Usage Report shows data for overall capacity quantity.
Concurrent Users License Report
To download the Concurrent Users License Report, select the date range, VM type (or 'allDesktopsApps' for all VMs), and Organization ID (or 'all' for all orgs), and then click the Download Report button.
A zip file downloads containing the GeneralReport file in .csv format.
This file shows peak concurrent users, along with any errors, for selected orgs.