I just migrated to the latest Zoom Windows SDK release (Dec 2019 v4.4.57220.1211). My app was previously using v4.3.47204.0325 from April 2019. My app fires up quite a bit of communications as it initializes and it has never triggered a Windows Defender alert dialog. Now, with the latest SDK, calling ZOOM_SDK_NAMESPACE::InitSDK(initParam) causes a “Windows Security Alert” from Windows Defender that says “Windows Defender Firewall has blocked some features of [application name] on all public and private networks.” There is an “Allow access” button and “Cancel”.
I have isolated the behavior to the Zoom InitSDK call. Also, if I revert to the older SDK, there is no alert. I built a test Windows app that does nothing but initialize the SDK. The new version causes an alert and the old version does not.