They need something they can control. You don't order the IT department to switch to "some Linux". You send them documentation of EU OS 1.1, send migration instructions, training materials for users and support documentation. When user has issues the IT department needs to be familiar with the OS. Any centralized services need to be compatible. This can be as simple as rebranding with some default configuration but they need a well defined system, not a general recommendations. This way EU can easily support it, people can move between departments and different institutions can collaborate. They are switching from Windows so they don't need flexibility. This is only for standard office work. You want to keep it as uniform as possible to make job easier for desktop support.