Sketchup Pro 2015 Network Licence Issue


hello all experts here,

We are an educational institute and procured upgraded version of skecthup but we are unable to make the licence through network,
As it was in earlier versions to make a PC acts a server and the network license resides on it, and serves to the no. of client pc.
Now in the 2015 version there is no provision to make network licence.
We came to know that to avail the network licence we need to connect all the client PCs to the internet all the time, which is very difficult in most of the scenario.
It was better handle the local PC having server licence.
we have got stuck here, we have already procured 120 licences and came to know about the cloud story.
Its not possible to use internet directly on clients pc.
there must be provision or facility of using local server as well.