Knox Workspace is not something that each employee can install and activate by themselves, and it needs to be activated and managed by an MDM solution. And so your MDM solution needs to support Knox Workspace and its features so that IT admins can install Knox Workspace on employees’ devices using the MDM commands.
Most major MDMs support Knox Workspace. The process works like this: Samsung distributes the Knox Premium SDK to MDM vendors, who then implements the functions that activate and manage Knox Workspace to their MDM server and client using the APIs described in the SDK. When implementation is done, the IT admin will see a menu and options on the console to activate and control the Workspace container.