Thanks EtherMAN for the additional input and clarification. Referenced MS guide does hint to it by mentioning that QoS should be deployed on managed LANs/WiFi networks as well as managed WAN. But Internet traffic is Best Effort. But could change in f...
Hi Bobby,
MS has information on optimizing networks for SfB:
https://support.office.com/en-us/article/Optimizing-your-network-for-Skype-for-Business-Online-b363b...
Although a bit dated the following Extreme guide has examples for configuring QoS ...