Your company has a Microsoft 365 subscription. When making voice calls from Microsoft Teams, users report poor call quality at specific times of the day. You need to verify whether Quality of Service (QoS) is being applied to the calls. What should you use? 

Answer options:

A. the Microsoft Teams client
B. Microsoft Call Quality Dashboard
C. Network Testing Companion
D. Network Monitor

D

References: https://docs.microsoft.com/en-us/microsoftteams/qos-in-teams#validate-the-qos-implementation