Update your firewall rules: Teams and Copilot are changing address
Summary
Microsoft is changing the destination addresses for M365 and Teams web users to new cloud domains. Organizations are advised to update their firewall rules, proxies, and other network controls to ensure continued access to these services.
IFF Assessment
FRIEND
This article provides important information for defenders regarding network configuration changes for widely used Microsoft services, enabling them to maintain access and security.
Defender Context
Defenders need to be aware of these IP and domain changes for Microsoft Teams and M365 services to ensure their network configurations (firewalls, proxies, etc.) allow proper access. Failing to update these rules could lead to service disruptions for users, which might initially be mistaken for a security incident.