If you are attempting to use PowerShell Desired State Configuration's MsiPackage Resource (https://github.com/PowerShell/PSDscResources#msipackage) you are required to provide the PackageGuid as the ProductId.

This information can be extracted a number of ways, the easiest is to have Orca installed and extract the Guid from the Property Table -> ProductCode Property.

However it would be much easier if Synergex Would Document each of these as anyone trying to setup a box will be required to provide them (especially during an upgrade).