For copies of Project purchased through retailers, you must accept the End User License Agreement.
For licenses acquired through Volume Licensing, the terms and conditions for how you can use the software are defined in the Commercial Licensing Terms and the Product List documents. General Terms and Conditions: Your use of Project is governed by your license with Microsoft. If you are purchasing fewer than five copies of Project Professional 2019 or Project Standard 2019, you may purchase them through resellers and retailers, such as the Microsoft Store.