Hello
Please review licensing program agreement, Product Terms document (https://www.microsoft.com/en-us/licensing/product-licensing/products), and/or other licensing documents applicable to your scenario. One section to pay particular attention to is the License Assignment and Reassignment section.
In general, you must assign a license to each person or device and you may not reassign that same license to another person or device within 90 days except for limited exceptions. For example, say a company has 1,000 employees, and they publish a windows training course application via RDS. First day, 100 employees use the application, next day, a different 100 employees use it, etc., until after 10 days all 1,000 employees have used it. In this example, 1,000 RDS CALs would be required under Per User licensing, even though each user only needed the application for a single day.
If possible, the example company could reduce licensing costs if they could use Per Device instead with 100 PCs dedicated for use connecting to this windows training course application.
Even under Per User the licensing server is keeping track of usage. An auditor could use this along with other sources of information to determine compliance with the license agreement.
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