Update your firewall rules by April 29, 2025, to ensure continued access to Microsoft Defender for Cloud Apps. Allow outbound traffic on port 443 for specified IP addresses or add the Azure service tag 'AzureFrontDoor.MicrosoftSecurity'. More details can be found in the network requirements documentation.
Applies to: Microsoft Defender XDR
Source: mc.merill.net — data via Merill Fernando's open archive (MIT).