HSNM Forum

I have been looking to logout all users so they can login again, but could not find that.

Is there anywhere I can do this?

No, at the moment we have not this functionality.
Have a nice day.

will restarting the gateways log them off? or do I need to restart the HNM server too?

Users are logged to the Gw so restart it will disconnect all of them.
Ensure that your Gw communicates with the HSNM so it can communicate that all users ara disconnected so HSNM will disconnect them inside the Radius server.