The installation files for Office 2019 are available on the Office Content Delivery Network (CDN) on the internet instead of on the Volume Licensing Service Center (VLSC). The Office Customization Tool (OCT) that you previously used for Windows Installer (MSI) is no longer used. To configure and perform deployments of volume licensed versions of Office 2019, including Project and Visio, for users in your organization, you use the Office Deployment Tool (ODT).
