What is the size of the mdt file? Date Published: 1/25/2019. File Size: 20.6 MB. 20.1 MB. The Microsoft Deployment Toolkit (MDT) is a free tool for automating Windows and Windows Server operating system deployment, leveraging the Windows Assessment and Deployment Kit (ADK) for Windows 10.What does mdt stand for? The Microsoft Deployment Toolkit (MDT) is for Windows operating system deployment.How do i install microsoft deployment workbench on an mdt server? From the link above, download the installer for the proper system architecture. Run the .msi on the target MDT server. Accept the Microsoft Software License Terms. Follow the steps in the installation process to complete the installation. Start the Deployment Workbench desktop app from the Start menu in the Microsoft Deployment Toolkit group.