Call Quality Dashboard showing internal Microsoft EndPoint and IP Addresses

If you upload the subnet info as Alexander has described, CQD should help you identify streams from your subnets from those happening outside your network.

One other thing to understand is the first and second concepts used in CQD. Every time a user joins a conference call, the first subnet is for the Microsoft server hosting the meeting and the second subnet is for the client. More information about first/second can be found here. https://support.office.com/en-us/article/Dimensions-and-measures-available-in-Call-Quality-Dashboard-for-Microsoft-Teams-and-Skype-for-Business-Online-e97aeeee-9e43-416f-b433-9cdd63d8874b