The Windows 10 Creators update is being rolled out for the Surface Hub.
There are a number of new features such as collaboration with the new Whiteboard.
One of the new features will be the usage of a “Self signed Certificate” for Usage of Exchange services.
On previous versions (prior the the Creators Update) this was not possible. You had to use a publicly signed Certificate. Even when the Exchange Server and the surface Hub were connected to the same internal network.