By December 2, 2025, update firewall allowlists to include Azure Front Door IP addresses or the service tag "AzureFrontDoor.MicrosoftSecurity" for Microsoft Intune and Basic Mobility and Security for Microsoft 365. Do not remove existing endpoints; add new ranges from the provided Azure IP range files.
Applies to: Basic Mobility and Security
Source: mc.merill.net — data via Merill Fernando's open archive (MIT).