Hello @mcgreg Welcome to our Community and thank you for your first post! 🌏️ A device will show offline if it does not meet one or more of the three requirements below. First - The device needs to be fully booted and not in a sleep/hibernate mode. Second - The device needs to have an active/working internet connection. Three - The TeamViewer application needs to be running on the device. I would suggest reviewing these requirements and then making sure the device in question meets all three. Let us know how it goes and if you need further help. 👍️
