Blocklists - Microsoft - Windows Defender

wdcp.microsoft.com  # used for Windows Defender when Cloud-based Protection is enabled.
wdcpalt.microsoft.com  # Used by Windows Defender Antivirus to provide cloud-delivered protection.

http://tsfe.trafficshaping.dsp.mp.microsoft.com  # Used for content regulation.

References

https://docs.microsoft.com/en-us/windows/privacy/manage-windows-endpoints

https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-antivirus/configure-network-connections-windows-defender-antivirus

https://docs.microsoft.com/en-us/windows/privacy/windows-endpoints-1803-non-enterprise-editions

https://docs.microsoft.com/en-us/windows/privacy/manage-windows-endpoints