(2021-08-06)
Looking for Teams Traffic?
Internet systems for voice, video and sharing are usually in the ranges 13.107.64.0/18 and/or 52.112.0.0/14 (note that this is not an exhaustive list, I've just caught 142.113.155.x servicing my teams session).
Ports on the Microsoft side are usually in the range 3478 to 3481
On the local client side, the ports used are typically:
- 50000-50019 (voice)
- 50020-50039 (video)
- 50040-50059 (sharing)
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Source)
At certain thresholds, Teams stops using UDP and switches to TCP packets.