With Montage, you can run sessions in two ways: connected to the cloud and local network only.
If Montage has access to the cloud, it can allow devices to connect from outside of its local network. E.g., A Chromebook client on a remote network and a Windows client connected on another network within your organization.
This can be restricted by deactivating access to the cloud in Montage settings by enabling or disabling Local Sessions only.
When connecting to a local session, Montage will ask for a 10 digit session ID.