you can save your template by going to file > save as template.
You will be able to save it as a .skp file.
To import it on another computer, go to your template directory (to quickly access it, go to window > preferences > file and click on the folder at the very bottom, on the template line) copy your .skp template file you previously saved and paste it on your network. Other users will be able to paste it in their own template folder.
Now because it is not allowed to modify the template path (you will notice the edit button is greyed out), you would have to do this operation again if you were to modify it.
one possibility is to “force” editing this path, by modifying the preferences.dat file.
export the preferences.dat file (still in preferences > files), edit it with a notepad and change the path for “Templates=C:\users…” to a network location, save it and import it again
I did not try it but it should work and you would have to do that on every single computer. It might lead to errors especially if you get disconnected from network, so use with caution
Another way would be to use the collaboration manager and store a blank skp model that would be used as a template that you can update as you wish