It was time to start deploying Windows 10 and Windows Server 2016. So an upgrade from MDT 2012 Update 2 to MDT 8443 was required in my Lab environment.

All my virtual machines with a Microsoft Windows Operating System are deployed with Microsoft Deployment Toolkit (MDT) / Windows Deployment Services (WDS).

After a successful upgrade to MDT 8443 and a Deployment Share upgrade everything looked fine… but when I started deploying Windows Machines an error occurred.

The following error was displayed at the end of the Deployment Wizard (Invalid DeploymentType=“”).

After some searching on the internet, I came across the following Microsoft TechNet post.

To resolve my problems, the following steps were required:

1. Create a backup from the following file (%DeploymentShare%\Scripts\DeployWiz_ProductKeyVista.vbs).
2. Open the following configuration file in your favorite code editor (%DeploymentShare%\Scripts\DeployWiz_ProductKeyVista.vbs).
3. In the configuration file locate line 52.
4. Change the line from (if oProperties(“DeploymentType”) = “UPGRADE” then) to (if Property(“DeploymentType”) = “UPGRADE” then).
5. Save configuration file.
6. Start a new MDT deployment.
7. Verify if the issue is fixed.

Now everything should be working as expected! Happy deploying :).