Hi,
i would like to propose that Default outbound Firewallrules for Windows * and Windows Server * are available by default, that you just have to activate them.
Open Outbound Firewalling for(used procmon to identify them):
C:\Program Files\Windows Defender Advanced Threat Protection\MsSense.exe
C:\Program Files\Windows Defender Advanced Threat Protection\SenseCncProxy.exe
C:\Program Files\Windows Defender Advanced Threat Protection\SenseIR.exe
C:\Program Files\Windows Defender Advanced Threat Protection\SenseNdr.exe
C:\Program Files\Windows Defender Advanced Threat Protection\SenseSampleUploader.exe
C:\Program Files\Windows Defender Advanced Threat Protection\SenseSC.exe
Service WinDefend
Service DiagTrack
c:\windows\system32\smartscreen.exe
Also Svchost (system pid4) is needed for updating CTL,CRL,RootCertupdates,... could anyone give a hint on how to restrict that a bit more?