Microsoft Project 2019 can be accessed for free via an official one-month trial of Project Plan 3, which includes the desktop client. For advanced deployment, users can utilize the Office Deployment Tool with specific configurations, or explore educational access options for students and teachers. To ensure security, download and install the software through official channels, such as the Microsoft Support website. For further instructions on using the Office Deployment Tool, refer to the guidance on Microsoft Q&A. Installer Project - Microsoft Support