When a MultiLine user has Microsoft Teams calling activated and both applications (Microsoft Teams and the MultiLine mobile app) installed on their device, they may encounter confusion when receiving a call on their MultiLine number. This is because both applications will simultaneously ring and display call notifications.
To improve user experience, the MultiLine mobile application includes a feature in its interface that allows users to toggle call notifications and ringing on or off. This way, users can choose to answer calls through the Microsoft Teams application based on their preferences set in the call settings.
Notification sent when feature is turned on. 
Notification to user if admin turns off ringing
Option in Call Settings
Option in Settings
