
This is really annoying to the end-users and it also hampers the user experience on a freshly provisioned device. You may have end-users complaining about receiving a Windows Defender Firewall prompt when they initiate or receive a call for the 1st time with Microsoft Teams application on their managed Windows 10 devices.

Understanding the MS Teams Firewall prompt scenario Windows Defender blocks MS Teams connection requests when user inititate or recieves a call for the first time on a Windows 10 device which does not have the required firewall rules in place to let the communication happen.


Understanding the MS Teams Firewall prompt scenario.
