Load variable from server

In my current project I have a server started on one PC, later on, another computer connects to the server and joins in. What I'd like is to have a variable (in this case an enum for what scenario is loaded) that is chosen on the host PC to be read on the client PC when the client connects. [SyncVar] doesn't do this if I understand correctly as the value changes before the second PC connects.

How would I go about having that second PC know that the scenario variable has changed?