When a device is scheduled for a meeting, you get a prompt from Webex Assistant to join the meeting 30 seconds before the meeting starts. The prompt is visible for 5 minutes after the meeting is scheduled to start.
When Webex Assistant for Devices is enabled in your organization, Proactive Join is by default On on all supported devices.
From the Touch 10 home screen, select the device name and Settings.
Under Advanced Settings, tap Webex Assistant. Then toggle Proactive Join on or off.