OSX Log out forces TeamViewer to become inaccessible

[square_eyes]

I have just implemented a home server with an old Mac Pro. It seems that after some period of being on, and available to remote control by TeamViewer, the machine goes offline after a while.

It's not asleep, and when I use OSX's "Share Screen" feature, I can access the server. Once I'm in on that service, TeamViewer pops up and tells me my machine online. So it seems its to do with the log in state of OSX.

My experience with TeamViewer on PC is that it can make a PC accessible whether a user is logged in or not. Is there some setting in OSX that will make it so that I can always access my server?

I'm using TeamViewer 10.0.36 on both machines and OSX Yosemite.